1 /* Generic symbol file reading for the GNU debugger, GDB.
3 Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
5 Free Software Foundation, Inc.
7 Contributed by Cygnus Support, using pieces from other GDB modules.
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
36 #include "breakpoint.h"
38 #include "complaints.h"
40 #include "inferior.h" /* for write_pc */
41 #include "filenames.h" /* for DOSish file names */
42 #include "gdb-stabs.h"
43 #include "gdb_obstack.h"
44 #include "completer.h"
47 #include "readline/readline.h"
48 #include "gdb_assert.h"
52 #include "parser-defs.h"
58 #include <sys/types.h>
60 #include "gdb_string.h"
67 int (*deprecated_ui_load_progress_hook
) (const char *section
, unsigned long num
);
68 void (*deprecated_show_load_progress
) (const char *section
,
69 unsigned long section_sent
,
70 unsigned long section_size
,
71 unsigned long total_sent
,
72 unsigned long total_size
);
73 void (*deprecated_pre_add_symbol_hook
) (const char *);
74 void (*deprecated_post_add_symbol_hook
) (void);
76 static void clear_symtab_users_cleanup (void *ignore
);
78 /* Global variables owned by this file */
79 int readnow_symbol_files
; /* Read full symbols immediately */
81 /* External variables and functions referenced. */
83 extern void report_transfer_performance (unsigned long, time_t, time_t);
85 /* Functions this file defines */
88 static int simple_read_overlay_region_table (void);
89 static void simple_free_overlay_region_table (void);
92 static void load_command (char *, int);
94 static void symbol_file_add_main_1 (char *args
, int from_tty
, int flags
);
96 static void add_symbol_file_command (char *, int);
98 static void add_shared_symbol_files_command (char *, int);
100 static void reread_separate_symbols (struct objfile
*objfile
);
102 static void cashier_psymtab (struct partial_symtab
*);
104 bfd
*symfile_bfd_open (char *);
106 int get_section_index (struct objfile
*, char *);
108 static struct sym_fns
*find_sym_fns (bfd
*);
110 static void decrement_reading_symtab (void *);
112 static void overlay_invalidate_all (void);
114 static int overlay_is_mapped (struct obj_section
*);
116 void list_overlays_command (char *, int);
118 void map_overlay_command (char *, int);
120 void unmap_overlay_command (char *, int);
122 static void overlay_auto_command (char *, int);
124 static void overlay_manual_command (char *, int);
126 static void overlay_off_command (char *, int);
128 static void overlay_load_command (char *, int);
130 static void overlay_command (char *, int);
132 static void simple_free_overlay_table (void);
134 static void read_target_long_array (CORE_ADDR
, unsigned int *, int);
136 static int simple_read_overlay_table (void);
138 static int simple_overlay_update_1 (struct obj_section
*);
140 static void add_filename_language (char *ext
, enum language lang
);
142 static void info_ext_lang_command (char *args
, int from_tty
);
144 static char *find_separate_debug_file (struct objfile
*objfile
);
146 static void init_filename_language_table (void);
148 static void symfile_find_segment_sections (struct objfile
*objfile
);
150 void _initialize_symfile (void);
152 /* List of all available sym_fns. On gdb startup, each object file reader
153 calls add_symtab_fns() to register information on each format it is
156 static struct sym_fns
*symtab_fns
= NULL
;
158 /* Flag for whether user will be reloading symbols multiple times.
159 Defaults to ON for VxWorks, otherwise OFF. */
161 #ifdef SYMBOL_RELOADING_DEFAULT
162 int symbol_reloading
= SYMBOL_RELOADING_DEFAULT
;
164 int symbol_reloading
= 0;
167 show_symbol_reloading (struct ui_file
*file
, int from_tty
,
168 struct cmd_list_element
*c
, const char *value
)
170 fprintf_filtered (file
, _("\
171 Dynamic symbol table reloading multiple times in one run is %s.\n"),
175 /* If non-zero, gdb will notify the user when it is loading symbols
176 from a file. This is almost always what users will want to have happen;
177 but for programs with lots of dynamically linked libraries, the output
178 can be more noise than signal. */
180 int print_symbol_loading
= 1;
182 /* If non-zero, shared library symbols will be added automatically
183 when the inferior is created, new libraries are loaded, or when
184 attaching to the inferior. This is almost always what users will
185 want to have happen; but for very large programs, the startup time
186 will be excessive, and so if this is a problem, the user can clear
187 this flag and then add the shared library symbols as needed. Note
188 that there is a potential for confusion, since if the shared
189 library symbols are not loaded, commands like "info fun" will *not*
190 report all the functions that are actually present. */
192 int auto_solib_add
= 1;
194 /* For systems that support it, a threshold size in megabytes. If
195 automatically adding a new library's symbol table to those already
196 known to the debugger would cause the total shared library symbol
197 size to exceed this threshhold, then the shlib's symbols are not
198 added. The threshold is ignored if the user explicitly asks for a
199 shlib to be added, such as when using the "sharedlibrary"
202 int auto_solib_limit
;
205 /* This compares two partial symbols by names, using strcmp_iw_ordered
206 for the comparison. */
209 compare_psymbols (const void *s1p
, const void *s2p
)
211 struct partial_symbol
*const *s1
= s1p
;
212 struct partial_symbol
*const *s2
= s2p
;
214 return strcmp_iw_ordered (SYMBOL_SEARCH_NAME (*s1
),
215 SYMBOL_SEARCH_NAME (*s2
));
219 sort_pst_symbols (struct partial_symtab
*pst
)
221 /* Sort the global list; don't sort the static list */
223 qsort (pst
->objfile
->global_psymbols
.list
+ pst
->globals_offset
,
224 pst
->n_global_syms
, sizeof (struct partial_symbol
*),
228 /* Make a null terminated copy of the string at PTR with SIZE characters in
229 the obstack pointed to by OBSTACKP . Returns the address of the copy.
230 Note that the string at PTR does not have to be null terminated, I.E. it
231 may be part of a larger string and we are only saving a substring. */
234 obsavestring (const char *ptr
, int size
, struct obstack
*obstackp
)
236 char *p
= (char *) obstack_alloc (obstackp
, size
+ 1);
237 /* Open-coded memcpy--saves function call time. These strings are usually
238 short. FIXME: Is this really still true with a compiler that can
241 const char *p1
= ptr
;
243 const char *end
= ptr
+ size
;
251 /* Concatenate strings S1, S2 and S3; return the new string. Space is found
252 in the obstack pointed to by OBSTACKP. */
255 obconcat (struct obstack
*obstackp
, const char *s1
, const char *s2
,
258 int len
= strlen (s1
) + strlen (s2
) + strlen (s3
) + 1;
259 char *val
= (char *) obstack_alloc (obstackp
, len
);
266 /* True if we are nested inside psymtab_to_symtab. */
268 int currently_reading_symtab
= 0;
271 decrement_reading_symtab (void *dummy
)
273 currently_reading_symtab
--;
276 /* Get the symbol table that corresponds to a partial_symtab.
277 This is fast after the first time you do it. In fact, there
278 is an even faster macro PSYMTAB_TO_SYMTAB that does the fast
282 psymtab_to_symtab (struct partial_symtab
*pst
)
284 /* If it's been looked up before, return it. */
288 /* If it has not yet been read in, read it. */
291 struct cleanup
*back_to
= make_cleanup (decrement_reading_symtab
, NULL
);
292 currently_reading_symtab
++;
293 (*pst
->read_symtab
) (pst
);
294 do_cleanups (back_to
);
300 /* Remember the lowest-addressed loadable section we've seen.
301 This function is called via bfd_map_over_sections.
303 In case of equal vmas, the section with the largest size becomes the
304 lowest-addressed loadable section.
306 If the vmas and sizes are equal, the last section is considered the
307 lowest-addressed loadable section. */
310 find_lowest_section (bfd
*abfd
, asection
*sect
, void *obj
)
312 asection
**lowest
= (asection
**) obj
;
314 if (0 == (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
))
317 *lowest
= sect
; /* First loadable section */
318 else if (bfd_section_vma (abfd
, *lowest
) > bfd_section_vma (abfd
, sect
))
319 *lowest
= sect
; /* A lower loadable section */
320 else if (bfd_section_vma (abfd
, *lowest
) == bfd_section_vma (abfd
, sect
)
321 && (bfd_section_size (abfd
, (*lowest
))
322 <= bfd_section_size (abfd
, sect
)))
326 /* Create a new section_addr_info, with room for NUM_SECTIONS. */
328 struct section_addr_info
*
329 alloc_section_addr_info (size_t num_sections
)
331 struct section_addr_info
*sap
;
334 size
= (sizeof (struct section_addr_info
)
335 + sizeof (struct other_sections
) * (num_sections
- 1));
336 sap
= (struct section_addr_info
*) xmalloc (size
);
337 memset (sap
, 0, size
);
338 sap
->num_sections
= num_sections
;
344 /* Return a freshly allocated copy of ADDRS. The section names, if
345 any, are also freshly allocated copies of those in ADDRS. */
346 struct section_addr_info
*
347 copy_section_addr_info (struct section_addr_info
*addrs
)
349 struct section_addr_info
*copy
350 = alloc_section_addr_info (addrs
->num_sections
);
353 copy
->num_sections
= addrs
->num_sections
;
354 for (i
= 0; i
< addrs
->num_sections
; i
++)
356 copy
->other
[i
].addr
= addrs
->other
[i
].addr
;
357 if (addrs
->other
[i
].name
)
358 copy
->other
[i
].name
= xstrdup (addrs
->other
[i
].name
);
360 copy
->other
[i
].name
= NULL
;
361 copy
->other
[i
].sectindex
= addrs
->other
[i
].sectindex
;
369 /* Build (allocate and populate) a section_addr_info struct from
370 an existing section table. */
372 extern struct section_addr_info
*
373 build_section_addr_info_from_section_table (const struct section_table
*start
,
374 const struct section_table
*end
)
376 struct section_addr_info
*sap
;
377 const struct section_table
*stp
;
380 sap
= alloc_section_addr_info (end
- start
);
382 for (stp
= start
, oidx
= 0; stp
!= end
; stp
++)
384 if (bfd_get_section_flags (stp
->bfd
,
385 stp
->the_bfd_section
) & (SEC_ALLOC
| SEC_LOAD
)
386 && oidx
< end
- start
)
388 sap
->other
[oidx
].addr
= stp
->addr
;
389 sap
->other
[oidx
].name
390 = xstrdup (bfd_section_name (stp
->bfd
, stp
->the_bfd_section
));
391 sap
->other
[oidx
].sectindex
= stp
->the_bfd_section
->index
;
400 /* Free all memory allocated by build_section_addr_info_from_section_table. */
403 free_section_addr_info (struct section_addr_info
*sap
)
407 for (idx
= 0; idx
< sap
->num_sections
; idx
++)
408 if (sap
->other
[idx
].name
)
409 xfree (sap
->other
[idx
].name
);
414 /* Initialize OBJFILE's sect_index_* members. */
416 init_objfile_sect_indices (struct objfile
*objfile
)
421 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
423 objfile
->sect_index_text
= sect
->index
;
425 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
427 objfile
->sect_index_data
= sect
->index
;
429 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
431 objfile
->sect_index_bss
= sect
->index
;
433 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
435 objfile
->sect_index_rodata
= sect
->index
;
437 /* This is where things get really weird... We MUST have valid
438 indices for the various sect_index_* members or gdb will abort.
439 So if for example, there is no ".text" section, we have to
440 accomodate that. First, check for a file with the standard
441 one or two segments. */
443 symfile_find_segment_sections (objfile
);
445 /* Except when explicitly adding symbol files at some address,
446 section_offsets contains nothing but zeros, so it doesn't matter
447 which slot in section_offsets the individual sect_index_* members
448 index into. So if they are all zero, it is safe to just point
449 all the currently uninitialized indices to the first slot. But
450 beware: if this is the main executable, it may be relocated
451 later, e.g. by the remote qOffsets packet, and then this will
452 be wrong! That's why we try segments first. */
454 for (i
= 0; i
< objfile
->num_sections
; i
++)
456 if (ANOFFSET (objfile
->section_offsets
, i
) != 0)
461 if (i
== objfile
->num_sections
)
463 if (objfile
->sect_index_text
== -1)
464 objfile
->sect_index_text
= 0;
465 if (objfile
->sect_index_data
== -1)
466 objfile
->sect_index_data
= 0;
467 if (objfile
->sect_index_bss
== -1)
468 objfile
->sect_index_bss
= 0;
469 if (objfile
->sect_index_rodata
== -1)
470 objfile
->sect_index_rodata
= 0;
474 /* The arguments to place_section. */
476 struct place_section_arg
478 struct section_offsets
*offsets
;
482 /* Find a unique offset to use for loadable section SECT if
483 the user did not provide an offset. */
486 place_section (bfd
*abfd
, asection
*sect
, void *obj
)
488 struct place_section_arg
*arg
= obj
;
489 CORE_ADDR
*offsets
= arg
->offsets
->offsets
, start_addr
;
491 ULONGEST align
= ((ULONGEST
) 1) << bfd_get_section_alignment (abfd
, sect
);
493 /* We are only interested in allocated sections. */
494 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
497 /* If the user specified an offset, honor it. */
498 if (offsets
[sect
->index
] != 0)
501 /* Otherwise, let's try to find a place for the section. */
502 start_addr
= (arg
->lowest
+ align
- 1) & -align
;
509 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
511 int indx
= cur_sec
->index
;
512 CORE_ADDR cur_offset
;
514 /* We don't need to compare against ourself. */
518 /* We can only conflict with allocated sections. */
519 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
522 /* If the section offset is 0, either the section has not been placed
523 yet, or it was the lowest section placed (in which case LOWEST
524 will be past its end). */
525 if (offsets
[indx
] == 0)
528 /* If this section would overlap us, then we must move up. */
529 if (start_addr
+ bfd_get_section_size (sect
) > offsets
[indx
]
530 && start_addr
< offsets
[indx
] + bfd_get_section_size (cur_sec
))
532 start_addr
= offsets
[indx
] + bfd_get_section_size (cur_sec
);
533 start_addr
= (start_addr
+ align
- 1) & -align
;
538 /* Otherwise, we appear to be OK. So far. */
543 offsets
[sect
->index
] = start_addr
;
544 arg
->lowest
= start_addr
+ bfd_get_section_size (sect
);
547 /* Parse the user's idea of an offset for dynamic linking, into our idea
548 of how to represent it for fast symbol reading. This is the default
549 version of the sym_fns.sym_offsets function for symbol readers that
550 don't need to do anything special. It allocates a section_offsets table
551 for the objectfile OBJFILE and stuffs ADDR into all of the offsets. */
554 default_symfile_offsets (struct objfile
*objfile
,
555 struct section_addr_info
*addrs
)
559 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
560 objfile
->section_offsets
= (struct section_offsets
*)
561 obstack_alloc (&objfile
->objfile_obstack
,
562 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
563 memset (objfile
->section_offsets
, 0,
564 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
566 /* Now calculate offsets for section that were specified by the
568 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
570 struct other_sections
*osp
;
572 osp
= &addrs
->other
[i
] ;
576 /* Record all sections in offsets */
577 /* The section_offsets in the objfile are here filled in using
579 (objfile
->section_offsets
)->offsets
[osp
->sectindex
] = osp
->addr
;
582 /* For relocatable files, all loadable sections will start at zero.
583 The zero is meaningless, so try to pick arbitrary addresses such
584 that no loadable sections overlap. This algorithm is quadratic,
585 but the number of sections in a single object file is generally
587 if ((bfd_get_file_flags (objfile
->obfd
) & (EXEC_P
| DYNAMIC
)) == 0)
589 struct place_section_arg arg
;
590 bfd
*abfd
= objfile
->obfd
;
592 CORE_ADDR lowest
= 0;
594 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
; cur_sec
= cur_sec
->next
)
595 /* We do not expect this to happen; just skip this step if the
596 relocatable file has a section with an assigned VMA. */
597 if (bfd_section_vma (abfd
, cur_sec
) != 0)
602 CORE_ADDR
*offsets
= objfile
->section_offsets
->offsets
;
604 /* Pick non-overlapping offsets for sections the user did not
606 arg
.offsets
= objfile
->section_offsets
;
608 bfd_map_over_sections (objfile
->obfd
, place_section
, &arg
);
610 /* Correctly filling in the section offsets is not quite
611 enough. Relocatable files have two properties that
612 (most) shared objects do not:
614 - Their debug information will contain relocations. Some
615 shared libraries do also, but many do not, so this can not
618 - If there are multiple code sections they will be loaded
619 at different relative addresses in memory than they are
620 in the objfile, since all sections in the file will start
623 Because GDB has very limited ability to map from an
624 address in debug info to the correct code section,
625 it relies on adding SECT_OFF_TEXT to things which might be
626 code. If we clear all the section offsets, and set the
627 section VMAs instead, then symfile_relocate_debug_section
628 will return meaningful debug information pointing at the
631 GDB has too many different data structures for section
632 addresses - a bfd, objfile, and so_list all have section
633 tables, as does exec_ops. Some of these could probably
636 for (cur_sec
= abfd
->sections
; cur_sec
!= NULL
;
637 cur_sec
= cur_sec
->next
)
639 if ((bfd_get_section_flags (abfd
, cur_sec
) & SEC_ALLOC
) == 0)
642 bfd_set_section_vma (abfd
, cur_sec
, offsets
[cur_sec
->index
]);
643 exec_set_section_address (bfd_get_filename (abfd
), cur_sec
->index
,
644 offsets
[cur_sec
->index
]);
645 offsets
[cur_sec
->index
] = 0;
650 /* Remember the bfd indexes for the .text, .data, .bss and
652 init_objfile_sect_indices (objfile
);
656 /* Divide the file into segments, which are individual relocatable units.
657 This is the default version of the sym_fns.sym_segments function for
658 symbol readers that do not have an explicit representation of segments.
659 It assumes that object files do not have segments, and fully linked
660 files have a single segment. */
662 struct symfile_segment_data
*
663 default_symfile_segments (bfd
*abfd
)
667 struct symfile_segment_data
*data
;
670 /* Relocatable files contain enough information to position each
671 loadable section independently; they should not be relocated
673 if ((bfd_get_file_flags (abfd
) & (EXEC_P
| DYNAMIC
)) == 0)
676 /* Make sure there is at least one loadable section in the file. */
677 for (sect
= abfd
->sections
; sect
!= NULL
; sect
= sect
->next
)
679 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
687 low
= bfd_get_section_vma (abfd
, sect
);
688 high
= low
+ bfd_get_section_size (sect
);
690 data
= XZALLOC (struct symfile_segment_data
);
691 data
->num_segments
= 1;
692 data
->segment_bases
= XCALLOC (1, CORE_ADDR
);
693 data
->segment_sizes
= XCALLOC (1, CORE_ADDR
);
695 num_sections
= bfd_count_sections (abfd
);
696 data
->segment_info
= XCALLOC (num_sections
, int);
698 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
702 if ((bfd_get_section_flags (abfd
, sect
) & SEC_ALLOC
) == 0)
705 vma
= bfd_get_section_vma (abfd
, sect
);
708 if (vma
+ bfd_get_section_size (sect
) > high
)
709 high
= vma
+ bfd_get_section_size (sect
);
711 data
->segment_info
[i
] = 1;
714 data
->segment_bases
[0] = low
;
715 data
->segment_sizes
[0] = high
- low
;
720 /* Process a symbol file, as either the main file or as a dynamically
723 OBJFILE is where the symbols are to be read from.
725 ADDRS is the list of section load addresses. If the user has given
726 an 'add-symbol-file' command, then this is the list of offsets and
727 addresses he or she provided as arguments to the command; or, if
728 we're handling a shared library, these are the actual addresses the
729 sections are loaded at, according to the inferior's dynamic linker
730 (as gleaned by GDB's shared library code). We convert each address
731 into an offset from the section VMA's as it appears in the object
732 file, and then call the file's sym_offsets function to convert this
733 into a format-specific offset table --- a `struct section_offsets'.
734 If ADDRS is non-zero, OFFSETS must be zero.
736 OFFSETS is a table of section offsets already in the right
737 format-specific representation. NUM_OFFSETS is the number of
738 elements present in OFFSETS->offsets. If OFFSETS is non-zero, we
739 assume this is the proper table the call to sym_offsets described
740 above would produce. Instead of calling sym_offsets, we just dump
741 it right into objfile->section_offsets. (When we're re-reading
742 symbols from an objfile, we don't have the original load address
743 list any more; all we have is the section offset table.) If
744 OFFSETS is non-zero, ADDRS must be zero.
746 MAINLINE is nonzero if this is the main symbol file, or zero if
747 it's an extra symbol file such as dynamically loaded code.
749 VERBO is nonzero if the caller has printed a verbose message about
750 the symbol reading (and complaints can be more terse about it). */
753 syms_from_objfile (struct objfile
*objfile
,
754 struct section_addr_info
*addrs
,
755 struct section_offsets
*offsets
,
760 struct section_addr_info
*local_addr
= NULL
;
761 struct cleanup
*old_chain
;
763 gdb_assert (! (addrs
&& offsets
));
765 init_entry_point_info (objfile
);
766 objfile
->sf
= find_sym_fns (objfile
->obfd
);
768 if (objfile
->sf
== NULL
)
769 return; /* No symbols. */
771 /* Make sure that partially constructed symbol tables will be cleaned up
772 if an error occurs during symbol reading. */
773 old_chain
= make_cleanup_free_objfile (objfile
);
775 /* If ADDRS and OFFSETS are both NULL, put together a dummy address
776 list. We now establish the convention that an addr of zero means
777 no load address was specified. */
778 if (! addrs
&& ! offsets
)
781 = alloc_section_addr_info (bfd_count_sections (objfile
->obfd
));
782 make_cleanup (xfree
, local_addr
);
786 /* Now either addrs or offsets is non-zero. */
790 /* We will modify the main symbol table, make sure that all its users
791 will be cleaned up if an error occurs during symbol reading. */
792 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
794 /* Since no error yet, throw away the old symbol table. */
796 if (symfile_objfile
!= NULL
)
798 free_objfile (symfile_objfile
);
799 symfile_objfile
= NULL
;
802 /* Currently we keep symbols from the add-symbol-file command.
803 If the user wants to get rid of them, they should do "symbol-file"
804 without arguments first. Not sure this is the best behavior
807 (*objfile
->sf
->sym_new_init
) (objfile
);
810 /* Convert addr into an offset rather than an absolute address.
811 We find the lowest address of a loaded segment in the objfile,
812 and assume that <addr> is where that got loaded.
814 We no longer warn if the lowest section is not a text segment (as
815 happens for the PA64 port. */
816 if (!mainline
&& addrs
&& addrs
->other
[0].name
)
818 asection
*lower_sect
;
820 CORE_ADDR lower_offset
;
823 /* Find lowest loadable section to be used as starting point for
824 continguous sections. FIXME!! won't work without call to find
825 .text first, but this assumes text is lowest section. */
826 lower_sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
827 if (lower_sect
== NULL
)
828 bfd_map_over_sections (objfile
->obfd
, find_lowest_section
,
830 if (lower_sect
== NULL
)
832 warning (_("no loadable sections found in added symbol-file %s"),
837 lower_offset
= bfd_section_vma (objfile
->obfd
, lower_sect
);
839 /* Calculate offsets for the loadable sections.
840 FIXME! Sections must be in order of increasing loadable section
841 so that contiguous sections can use the lower-offset!!!
843 Adjust offsets if the segments are not contiguous.
844 If the section is contiguous, its offset should be set to
845 the offset of the highest loadable section lower than it
846 (the loadable section directly below it in memory).
847 this_offset = lower_offset = lower_addr - lower_orig_addr */
849 for (i
= 0; i
< addrs
->num_sections
&& addrs
->other
[i
].name
; i
++)
851 if (addrs
->other
[i
].addr
!= 0)
853 sect
= bfd_get_section_by_name (objfile
->obfd
,
854 addrs
->other
[i
].name
);
858 -= bfd_section_vma (objfile
->obfd
, sect
);
859 lower_offset
= addrs
->other
[i
].addr
;
860 /* This is the index used by BFD. */
861 addrs
->other
[i
].sectindex
= sect
->index
;
865 warning (_("section %s not found in %s"),
866 addrs
->other
[i
].name
,
868 addrs
->other
[i
].addr
= 0;
872 addrs
->other
[i
].addr
= lower_offset
;
876 /* Initialize symbol reading routines for this objfile, allow complaints to
877 appear for this new file, and record how verbose to be, then do the
878 initial symbol reading for this file. */
880 (*objfile
->sf
->sym_init
) (objfile
);
881 clear_complaints (&symfile_complaints
, 1, verbo
);
884 (*objfile
->sf
->sym_offsets
) (objfile
, addrs
);
887 size_t size
= SIZEOF_N_SECTION_OFFSETS (num_offsets
);
889 /* Just copy in the offset table directly as given to us. */
890 objfile
->num_sections
= num_offsets
;
891 objfile
->section_offsets
892 = ((struct section_offsets
*)
893 obstack_alloc (&objfile
->objfile_obstack
, size
));
894 memcpy (objfile
->section_offsets
, offsets
, size
);
896 init_objfile_sect_indices (objfile
);
899 (*objfile
->sf
->sym_read
) (objfile
, mainline
);
901 /* Don't allow char * to have a typename (else would get caddr_t).
902 Ditto void *. FIXME: Check whether this is now done by all the
903 symbol readers themselves (many of them now do), and if so remove
906 TYPE_NAME (lookup_pointer_type (builtin_type_char
)) = 0;
907 TYPE_NAME (lookup_pointer_type (builtin_type_void
)) = 0;
909 /* Mark the objfile has having had initial symbol read attempted. Note
910 that this does not mean we found any symbols... */
912 objfile
->flags
|= OBJF_SYMS
;
914 /* Discard cleanups as symbol reading was successful. */
916 discard_cleanups (old_chain
);
919 /* Perform required actions after either reading in the initial
920 symbols for a new objfile, or mapping in the symbols from a reusable
924 new_symfile_objfile (struct objfile
*objfile
, int mainline
, int verbo
)
927 /* If this is the main symbol file we have to clean up all users of the
928 old main symbol file. Otherwise it is sufficient to fixup all the
929 breakpoints that may have been redefined by this symbol file. */
932 /* OK, make it the "real" symbol file. */
933 symfile_objfile
= objfile
;
935 clear_symtab_users ();
939 breakpoint_re_set ();
942 /* We're done reading the symbol file; finish off complaints. */
943 clear_complaints (&symfile_complaints
, 0, verbo
);
946 /* Process a symbol file, as either the main file or as a dynamically
949 ABFD is a BFD already open on the file, as from symfile_bfd_open.
950 This BFD will be closed on error, and is always consumed by this function.
952 FROM_TTY says how verbose to be.
954 MAINLINE specifies whether this is the main symbol file, or whether
955 it's an extra symbol file such as dynamically loaded code.
957 ADDRS, OFFSETS, and NUM_OFFSETS are as described for
958 syms_from_objfile, above. ADDRS is ignored when MAINLINE is
961 Upon success, returns a pointer to the objfile that was added.
962 Upon failure, jumps back to command level (never returns). */
963 static struct objfile
*
964 symbol_file_add_with_addrs_or_offsets (bfd
*abfd
, int from_tty
,
965 struct section_addr_info
*addrs
,
966 struct section_offsets
*offsets
,
968 int mainline
, int flags
)
970 struct objfile
*objfile
;
971 struct partial_symtab
*psymtab
;
972 char *debugfile
= NULL
;
973 struct section_addr_info
*orig_addrs
= NULL
;
974 struct cleanup
*my_cleanups
;
975 const char *name
= bfd_get_filename (abfd
);
977 my_cleanups
= make_cleanup_bfd_close (abfd
);
979 /* Give user a chance to burp if we'd be
980 interactively wiping out any existing symbols. */
982 if ((have_full_symbols () || have_partial_symbols ())
985 && !query ("Load new symbol table from \"%s\"? ", name
))
986 error (_("Not confirmed."));
988 objfile
= allocate_objfile (abfd
, flags
);
989 discard_cleanups (my_cleanups
);
993 orig_addrs
= copy_section_addr_info (addrs
);
994 make_cleanup_free_section_addr_info (orig_addrs
);
997 /* We either created a new mapped symbol table, mapped an existing
998 symbol table file which has not had initial symbol reading
999 performed, or need to read an unmapped symbol table. */
1000 if (from_tty
|| info_verbose
)
1002 if (deprecated_pre_add_symbol_hook
)
1003 deprecated_pre_add_symbol_hook (name
);
1006 if (print_symbol_loading
)
1008 printf_unfiltered (_("Reading symbols from %s..."), name
);
1010 gdb_flush (gdb_stdout
);
1014 syms_from_objfile (objfile
, addrs
, offsets
, num_offsets
,
1015 mainline
, from_tty
);
1017 /* We now have at least a partial symbol table. Check to see if the
1018 user requested that all symbols be read on initial access via either
1019 the gdb startup command line or on a per symbol file basis. Expand
1020 all partial symbol tables for this objfile if so. */
1022 if ((flags
& OBJF_READNOW
) || readnow_symbol_files
)
1024 if ((from_tty
|| info_verbose
) && print_symbol_loading
)
1026 printf_unfiltered (_("expanding to full symbols..."));
1028 gdb_flush (gdb_stdout
);
1031 for (psymtab
= objfile
->psymtabs
;
1033 psymtab
= psymtab
->next
)
1035 psymtab_to_symtab (psymtab
);
1039 /* If the file has its own symbol tables it has no separate debug info.
1040 `.dynsym'/`.symtab' go to MSYMBOLS, `.debug_info' goes to SYMTABS/PSYMTABS.
1041 `.gnu_debuglink' may no longer be present with `.note.gnu.build-id'. */
1042 if (objfile
->psymtabs
== NULL
)
1043 debugfile
= find_separate_debug_file (objfile
);
1048 objfile
->separate_debug_objfile
1049 = symbol_file_add (debugfile
, from_tty
, orig_addrs
, 0, flags
);
1053 objfile
->separate_debug_objfile
1054 = symbol_file_add (debugfile
, from_tty
, NULL
, 0, flags
);
1056 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
1059 /* Put the separate debug object before the normal one, this is so that
1060 usage of the ALL_OBJFILES_SAFE macro will stay safe. */
1061 put_objfile_before (objfile
->separate_debug_objfile
, objfile
);
1066 if (!have_partial_symbols () && !have_full_symbols ()
1067 && print_symbol_loading
)
1070 printf_filtered (_("(no debugging symbols found)"));
1071 if (from_tty
|| info_verbose
)
1072 printf_filtered ("...");
1074 printf_filtered ("\n");
1078 if (from_tty
|| info_verbose
)
1080 if (deprecated_post_add_symbol_hook
)
1081 deprecated_post_add_symbol_hook ();
1084 if (print_symbol_loading
)
1085 printf_unfiltered (_("done.\n"));
1089 /* We print some messages regardless of whether 'from_tty ||
1090 info_verbose' is true, so make sure they go out at the right
1092 gdb_flush (gdb_stdout
);
1094 do_cleanups (my_cleanups
);
1096 if (objfile
->sf
== NULL
)
1097 return objfile
; /* No symbols. */
1099 new_symfile_objfile (objfile
, mainline
, from_tty
);
1101 observer_notify_new_objfile (objfile
);
1103 bfd_cache_close_all ();
1108 /* Process the symbol file ABFD, as either the main file or as a
1109 dynamically loaded file.
1111 See symbol_file_add_with_addrs_or_offsets's comments for
1114 symbol_file_add_from_bfd (bfd
*abfd
, int from_tty
,
1115 struct section_addr_info
*addrs
,
1116 int mainline
, int flags
)
1118 return symbol_file_add_with_addrs_or_offsets (abfd
,
1119 from_tty
, addrs
, 0, 0,
1124 /* Process a symbol file, as either the main file or as a dynamically
1125 loaded file. See symbol_file_add_with_addrs_or_offsets's comments
1128 symbol_file_add (char *name
, int from_tty
, struct section_addr_info
*addrs
,
1129 int mainline
, int flags
)
1131 return symbol_file_add_from_bfd (symfile_bfd_open (name
), from_tty
,
1132 addrs
, mainline
, flags
);
1136 /* Call symbol_file_add() with default values and update whatever is
1137 affected by the loading of a new main().
1138 Used when the file is supplied in the gdb command line
1139 and by some targets with special loading requirements.
1140 The auxiliary function, symbol_file_add_main_1(), has the flags
1141 argument for the switches that can only be specified in the symbol_file
1145 symbol_file_add_main (char *args
, int from_tty
)
1147 symbol_file_add_main_1 (args
, from_tty
, 0);
1151 symbol_file_add_main_1 (char *args
, int from_tty
, int flags
)
1153 symbol_file_add (args
, from_tty
, NULL
, 1, flags
);
1155 /* Getting new symbols may change our opinion about
1156 what is frameless. */
1157 reinit_frame_cache ();
1159 set_initial_language ();
1163 symbol_file_clear (int from_tty
)
1165 if ((have_full_symbols () || have_partial_symbols ())
1168 ? !query (_("Discard symbol table from `%s'? "),
1169 symfile_objfile
->name
)
1170 : !query (_("Discard symbol table? "))))
1171 error (_("Not confirmed."));
1172 free_all_objfiles ();
1174 /* solib descriptors may have handles to objfiles. Since their
1175 storage has just been released, we'd better wipe the solib
1176 descriptors as well.
1178 no_shared_libraries (NULL
, from_tty
);
1180 symfile_objfile
= NULL
;
1182 printf_unfiltered (_("No symbol file now.\n"));
1191 /* Locate NT_GNU_BUILD_ID from ABFD and return its content. */
1193 static struct build_id
*
1194 build_id_bfd_get (bfd
*abfd
)
1196 struct build_id
*retval
;
1198 if (!bfd_check_format (abfd
, bfd_object
)
1199 || bfd_get_flavour (abfd
) != bfd_target_elf_flavour
1200 || elf_tdata (abfd
)->build_id
== NULL
)
1203 retval
= xmalloc (sizeof *retval
- 1 + elf_tdata (abfd
)->build_id_size
);
1204 retval
->size
= elf_tdata (abfd
)->build_id_size
;
1205 memcpy (retval
->data
, elf_tdata (abfd
)->build_id
, retval
->size
);
1210 /* Return if FILENAME has NT_GNU_BUILD_ID matching the CHECK value. */
1213 build_id_verify (const char *filename
, struct build_id
*check
)
1216 struct build_id
*found
= NULL
;
1219 /* We expect to be silent on the non-existing files. */
1220 if (remote_filename_p (filename
))
1221 abfd
= remote_bfd_open (filename
, gnutarget
);
1223 abfd
= bfd_openr (filename
, gnutarget
);
1227 found
= build_id_bfd_get (abfd
);
1230 warning (_("File \"%s\" has no build-id, file skipped"), filename
);
1231 else if (found
->size
!= check
->size
1232 || memcmp (found
->data
, check
->data
, found
->size
) != 0)
1233 warning (_("File \"%s\" has a different build-id, file skipped"), filename
);
1237 if (!bfd_close (abfd
))
1238 warning (_("cannot close \"%s\": %s"), filename
,
1239 bfd_errmsg (bfd_get_error ()));
1244 build_id_to_debug_filename (struct build_id
*build_id
)
1246 char *link
, *s
, *retval
= NULL
;
1247 gdb_byte
*data
= build_id
->data
;
1248 size_t size
= build_id
->size
;
1250 /* DEBUG_FILE_DIRECTORY/.build-id/ab/cdef */
1251 link
= xmalloc (strlen (debug_file_directory
) + (sizeof "/.build-id/" - 1) + 1
1252 + 2 * size
+ (sizeof ".debug" - 1) + 1);
1253 s
= link
+ sprintf (link
, "%s/.build-id/", debug_file_directory
);
1257 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1262 s
+= sprintf (s
, "%02x", (unsigned) *data
++);
1263 strcpy (s
, ".debug");
1265 /* lrealpath() is expensive even for the usually non-existent files. */
1266 if (access (link
, F_OK
) == 0)
1267 retval
= lrealpath (link
);
1270 if (retval
!= NULL
&& !build_id_verify (retval
, build_id
))
1280 get_debug_link_info (struct objfile
*objfile
, unsigned long *crc32_out
)
1283 bfd_size_type debuglink_size
;
1284 unsigned long crc32
;
1289 sect
= bfd_get_section_by_name (objfile
->obfd
, ".gnu_debuglink");
1294 debuglink_size
= bfd_section_size (objfile
->obfd
, sect
);
1296 contents
= xmalloc (debuglink_size
);
1297 bfd_get_section_contents (objfile
->obfd
, sect
, contents
,
1298 (file_ptr
)0, (bfd_size_type
)debuglink_size
);
1300 /* Crc value is stored after the filename, aligned up to 4 bytes. */
1301 crc_offset
= strlen (contents
) + 1;
1302 crc_offset
= (crc_offset
+ 3) & ~3;
1304 crc32
= bfd_get_32 (objfile
->obfd
, (bfd_byte
*) (contents
+ crc_offset
));
1311 separate_debug_file_exists (const char *name
, unsigned long crc
)
1313 unsigned long file_crc
= 0;
1315 gdb_byte buffer
[8*1024];
1318 if (remote_filename_p (name
))
1319 abfd
= remote_bfd_open (name
, gnutarget
);
1321 abfd
= bfd_openr (name
, gnutarget
);
1326 while ((count
= bfd_bread (buffer
, sizeof (buffer
), abfd
)) > 0)
1327 file_crc
= gnu_debuglink_crc32 (file_crc
, buffer
, count
);
1331 return crc
== file_crc
;
1334 char *debug_file_directory
= NULL
;
1336 show_debug_file_directory (struct ui_file
*file
, int from_tty
,
1337 struct cmd_list_element
*c
, const char *value
)
1339 fprintf_filtered (file
, _("\
1340 The directory where separate debug symbols are searched for is \"%s\".\n"),
1344 #if ! defined (DEBUG_SUBDIRECTORY)
1345 #define DEBUG_SUBDIRECTORY ".debug"
1349 find_separate_debug_file (struct objfile
*objfile
)
1357 bfd_size_type debuglink_size
;
1358 unsigned long crc32
;
1360 struct build_id
*build_id
;
1362 build_id
= build_id_bfd_get (objfile
->obfd
);
1363 if (build_id
!= NULL
)
1365 char *build_id_name
;
1367 build_id_name
= build_id_to_debug_filename (build_id
);
1369 /* Prevent looping on a stripped .debug file. */
1370 if (build_id_name
!= NULL
&& strcmp (build_id_name
, objfile
->name
) == 0)
1372 warning (_("\"%s\": separate debug info file has no debug info"),
1374 xfree (build_id_name
);
1376 else if (build_id_name
!= NULL
)
1377 return build_id_name
;
1380 basename
= get_debug_link_info (objfile
, &crc32
);
1382 if (basename
== NULL
)
1385 dir
= xstrdup (objfile
->name
);
1387 /* Strip off the final filename part, leaving the directory name,
1388 followed by a slash. Objfile names should always be absolute and
1389 tilde-expanded, so there should always be a slash in there
1391 for (i
= strlen(dir
) - 1; i
>= 0; i
--)
1393 if (IS_DIR_SEPARATOR (dir
[i
]))
1396 gdb_assert (i
>= 0 && IS_DIR_SEPARATOR (dir
[i
]));
1399 debugfile
= alloca (strlen (debug_file_directory
) + 1
1401 + strlen (DEBUG_SUBDIRECTORY
)
1406 /* First try in the same directory as the original file. */
1407 strcpy (debugfile
, dir
);
1408 strcat (debugfile
, basename
);
1410 if (separate_debug_file_exists (debugfile
, crc32
))
1414 return xstrdup (debugfile
);
1417 /* Then try in the subdirectory named DEBUG_SUBDIRECTORY. */
1418 strcpy (debugfile
, dir
);
1419 strcat (debugfile
, DEBUG_SUBDIRECTORY
);
1420 strcat (debugfile
, "/");
1421 strcat (debugfile
, basename
);
1423 if (separate_debug_file_exists (debugfile
, crc32
))
1427 return xstrdup (debugfile
);
1430 /* Then try in the global debugfile directory. */
1431 strcpy (debugfile
, debug_file_directory
);
1432 strcat (debugfile
, "/");
1433 strcat (debugfile
, dir
);
1434 strcat (debugfile
, basename
);
1436 if (separate_debug_file_exists (debugfile
, crc32
))
1440 return xstrdup (debugfile
);
1443 /* If the file is in the sysroot, try using its base path in the
1444 global debugfile directory. */
1445 canon_name
= lrealpath (dir
);
1447 && strncmp (canon_name
, gdb_sysroot
, strlen (gdb_sysroot
)) == 0
1448 && IS_DIR_SEPARATOR (canon_name
[strlen (gdb_sysroot
)]))
1450 strcpy (debugfile
, debug_file_directory
);
1451 strcat (debugfile
, canon_name
+ strlen (gdb_sysroot
));
1452 strcat (debugfile
, "/");
1453 strcat (debugfile
, basename
);
1455 if (separate_debug_file_exists (debugfile
, crc32
))
1460 return xstrdup (debugfile
);
1473 /* This is the symbol-file command. Read the file, analyze its
1474 symbols, and add a struct symtab to a symtab list. The syntax of
1475 the command is rather bizarre:
1477 1. The function buildargv implements various quoting conventions
1478 which are undocumented and have little or nothing in common with
1479 the way things are quoted (or not quoted) elsewhere in GDB.
1481 2. Options are used, which are not generally used in GDB (perhaps
1482 "set mapped on", "set readnow on" would be better)
1484 3. The order of options matters, which is contrary to GNU
1485 conventions (because it is confusing and inconvenient). */
1488 symbol_file_command (char *args
, int from_tty
)
1494 symbol_file_clear (from_tty
);
1498 char **argv
= buildargv (args
);
1499 int flags
= OBJF_USERLOADED
;
1500 struct cleanup
*cleanups
;
1506 cleanups
= make_cleanup_freeargv (argv
);
1507 while (*argv
!= NULL
)
1509 if (strcmp (*argv
, "-readnow") == 0)
1510 flags
|= OBJF_READNOW
;
1511 else if (**argv
== '-')
1512 error (_("unknown option `%s'"), *argv
);
1515 symbol_file_add_main_1 (*argv
, from_tty
, flags
);
1523 error (_("no symbol file name was specified"));
1525 do_cleanups (cleanups
);
1529 /* Set the initial language.
1531 FIXME: A better solution would be to record the language in the
1532 psymtab when reading partial symbols, and then use it (if known) to
1533 set the language. This would be a win for formats that encode the
1534 language in an easily discoverable place, such as DWARF. For
1535 stabs, we can jump through hoops looking for specially named
1536 symbols or try to intuit the language from the specific type of
1537 stabs we find, but we can't do that until later when we read in
1541 set_initial_language (void)
1543 struct partial_symtab
*pst
;
1544 enum language lang
= language_unknown
;
1546 pst
= find_main_psymtab ();
1549 if (pst
->filename
!= NULL
)
1550 lang
= deduce_language_from_filename (pst
->filename
);
1552 if (lang
== language_unknown
)
1554 /* Make C the default language */
1558 set_language (lang
);
1559 expected_language
= current_language
; /* Don't warn the user. */
1563 /* Open the file specified by NAME and hand it off to BFD for
1564 preliminary analysis. Return a newly initialized bfd *, which
1565 includes a newly malloc'd` copy of NAME (tilde-expanded and made
1566 absolute). In case of trouble, error() is called. */
1569 symfile_bfd_open (char *name
)
1573 char *absolute_name
;
1575 if (remote_filename_p (name
))
1577 name
= xstrdup (name
);
1578 sym_bfd
= remote_bfd_open (name
, gnutarget
);
1581 make_cleanup (xfree
, name
);
1582 error (_("`%s': can't open to read symbols: %s."), name
,
1583 bfd_errmsg (bfd_get_error ()));
1586 if (!bfd_check_format (sym_bfd
, bfd_object
))
1588 bfd_close (sym_bfd
);
1589 make_cleanup (xfree
, name
);
1590 error (_("`%s': can't read symbols: %s."), name
,
1591 bfd_errmsg (bfd_get_error ()));
1597 name
= tilde_expand (name
); /* Returns 1st new malloc'd copy. */
1599 /* Look down path for it, allocate 2nd new malloc'd copy. */
1600 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, name
,
1601 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1602 #if defined(__GO32__) || defined(_WIN32) || defined (__CYGWIN__)
1605 char *exename
= alloca (strlen (name
) + 5);
1606 strcat (strcpy (exename
, name
), ".exe");
1607 desc
= openp (getenv ("PATH"), OPF_TRY_CWD_FIRST
, exename
,
1608 O_RDONLY
| O_BINARY
, 0, &absolute_name
);
1613 make_cleanup (xfree
, name
);
1614 perror_with_name (name
);
1617 /* Free 1st new malloc'd copy, but keep the 2nd malloc'd copy in
1618 bfd. It'll be freed in free_objfile(). */
1620 name
= absolute_name
;
1622 sym_bfd
= bfd_fopen (name
, gnutarget
, FOPEN_RB
, desc
);
1626 make_cleanup (xfree
, name
);
1627 error (_("`%s': can't open to read symbols: %s."), name
,
1628 bfd_errmsg (bfd_get_error ()));
1630 bfd_set_cacheable (sym_bfd
, 1);
1632 if (!bfd_check_format (sym_bfd
, bfd_object
))
1634 /* FIXME: should be checking for errors from bfd_close (for one
1635 thing, on error it does not free all the storage associated
1637 bfd_close (sym_bfd
); /* This also closes desc. */
1638 make_cleanup (xfree
, name
);
1639 error (_("`%s': can't read symbols: %s."), name
,
1640 bfd_errmsg (bfd_get_error ()));
1646 /* Return the section index for SECTION_NAME on OBJFILE. Return -1 if
1647 the section was not found. */
1650 get_section_index (struct objfile
*objfile
, char *section_name
)
1652 asection
*sect
= bfd_get_section_by_name (objfile
->obfd
, section_name
);
1660 /* Link SF into the global symtab_fns list. Called on startup by the
1661 _initialize routine in each object file format reader, to register
1662 information about each format the the reader is prepared to
1666 add_symtab_fns (struct sym_fns
*sf
)
1668 sf
->next
= symtab_fns
;
1672 /* Initialize OBJFILE to read symbols from its associated BFD. It
1673 either returns or calls error(). The result is an initialized
1674 struct sym_fns in the objfile structure, that contains cached
1675 information about the symbol file. */
1677 static struct sym_fns
*
1678 find_sym_fns (bfd
*abfd
)
1681 enum bfd_flavour our_flavour
= bfd_get_flavour (abfd
);
1683 if (our_flavour
== bfd_target_srec_flavour
1684 || our_flavour
== bfd_target_ihex_flavour
1685 || our_flavour
== bfd_target_tekhex_flavour
)
1686 return NULL
; /* No symbols. */
1688 for (sf
= symtab_fns
; sf
!= NULL
; sf
= sf
->next
)
1689 if (our_flavour
== sf
->sym_flavour
)
1692 error (_("I'm sorry, Dave, I can't do that. Symbol format `%s' unknown."),
1693 bfd_get_target (abfd
));
1697 /* This function runs the load command of our current target. */
1700 load_command (char *arg
, int from_tty
)
1702 /* The user might be reloading because the binary has changed. Take
1703 this opportunity to check. */
1704 reopen_exec_file ();
1712 parg
= arg
= get_exec_file (1);
1714 /* Count how many \ " ' tab space there are in the name. */
1715 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1723 /* We need to quote this string so buildargv can pull it apart. */
1724 char *temp
= xmalloc (strlen (arg
) + count
+ 1 );
1728 make_cleanup (xfree
, temp
);
1731 while ((parg
= strpbrk (parg
, "\\\"'\t ")))
1733 strncpy (ptemp
, prev
, parg
- prev
);
1734 ptemp
+= parg
- prev
;
1738 strcpy (ptemp
, prev
);
1744 target_load (arg
, from_tty
);
1746 /* After re-loading the executable, we don't really know which
1747 overlays are mapped any more. */
1748 overlay_cache_invalid
= 1;
1751 /* This version of "load" should be usable for any target. Currently
1752 it is just used for remote targets, not inftarg.c or core files,
1753 on the theory that only in that case is it useful.
1755 Avoiding xmodem and the like seems like a win (a) because we don't have
1756 to worry about finding it, and (b) On VMS, fork() is very slow and so
1757 we don't want to run a subprocess. On the other hand, I'm not sure how
1758 performance compares. */
1760 static int validate_download
= 0;
1762 /* Callback service function for generic_load (bfd_map_over_sections). */
1765 add_section_size_callback (bfd
*abfd
, asection
*asec
, void *data
)
1767 bfd_size_type
*sum
= data
;
1769 *sum
+= bfd_get_section_size (asec
);
1772 /* Opaque data for load_section_callback. */
1773 struct load_section_data
{
1774 unsigned long load_offset
;
1775 struct load_progress_data
*progress_data
;
1776 VEC(memory_write_request_s
) *requests
;
1779 /* Opaque data for load_progress. */
1780 struct load_progress_data
{
1781 /* Cumulative data. */
1782 unsigned long write_count
;
1783 unsigned long data_count
;
1784 bfd_size_type total_size
;
1787 /* Opaque data for load_progress for a single section. */
1788 struct load_progress_section_data
{
1789 struct load_progress_data
*cumulative
;
1791 /* Per-section data. */
1792 const char *section_name
;
1793 ULONGEST section_sent
;
1794 ULONGEST section_size
;
1799 /* Target write callback routine for progress reporting. */
1802 load_progress (ULONGEST bytes
, void *untyped_arg
)
1804 struct load_progress_section_data
*args
= untyped_arg
;
1805 struct load_progress_data
*totals
;
1808 /* Writing padding data. No easy way to get at the cumulative
1809 stats, so just ignore this. */
1812 totals
= args
->cumulative
;
1814 if (bytes
== 0 && args
->section_sent
== 0)
1816 /* The write is just starting. Let the user know we've started
1818 ui_out_message (uiout
, 0, "Loading section %s, size 0x%s lma 0x%s\n",
1819 args
->section_name
, paddr_nz (args
->section_size
),
1820 paddr_nz (args
->lma
));
1824 if (validate_download
)
1826 /* Broken memories and broken monitors manifest themselves here
1827 when bring new computers to life. This doubles already slow
1829 /* NOTE: cagney/1999-10-18: A more efficient implementation
1830 might add a verify_memory() method to the target vector and
1831 then use that. remote.c could implement that method using
1832 the ``qCRC'' packet. */
1833 gdb_byte
*check
= xmalloc (bytes
);
1834 struct cleanup
*verify_cleanups
= make_cleanup (xfree
, check
);
1836 if (target_read_memory (args
->lma
, check
, bytes
) != 0)
1837 error (_("Download verify read failed at 0x%s"),
1839 if (memcmp (args
->buffer
, check
, bytes
) != 0)
1840 error (_("Download verify compare failed at 0x%s"),
1842 do_cleanups (verify_cleanups
);
1844 totals
->data_count
+= bytes
;
1846 args
->buffer
+= bytes
;
1847 totals
->write_count
+= 1;
1848 args
->section_sent
+= bytes
;
1850 || (deprecated_ui_load_progress_hook
!= NULL
1851 && deprecated_ui_load_progress_hook (args
->section_name
,
1852 args
->section_sent
)))
1853 error (_("Canceled the download"));
1855 if (deprecated_show_load_progress
!= NULL
)
1856 deprecated_show_load_progress (args
->section_name
,
1860 totals
->total_size
);
1863 /* Callback service function for generic_load (bfd_map_over_sections). */
1866 load_section_callback (bfd
*abfd
, asection
*asec
, void *data
)
1868 struct memory_write_request
*new_request
;
1869 struct load_section_data
*args
= data
;
1870 struct load_progress_section_data
*section_data
;
1871 bfd_size_type size
= bfd_get_section_size (asec
);
1873 const char *sect_name
= bfd_get_section_name (abfd
, asec
);
1875 if ((bfd_get_section_flags (abfd
, asec
) & SEC_LOAD
) == 0)
1881 new_request
= VEC_safe_push (memory_write_request_s
,
1882 args
->requests
, NULL
);
1883 memset (new_request
, 0, sizeof (struct memory_write_request
));
1884 section_data
= xcalloc (1, sizeof (struct load_progress_section_data
));
1885 new_request
->begin
= bfd_section_lma (abfd
, asec
) + args
->load_offset
;
1886 new_request
->end
= new_request
->begin
+ size
; /* FIXME Should size be in instead? */
1887 new_request
->data
= xmalloc (size
);
1888 new_request
->baton
= section_data
;
1890 buffer
= new_request
->data
;
1892 section_data
->cumulative
= args
->progress_data
;
1893 section_data
->section_name
= sect_name
;
1894 section_data
->section_size
= size
;
1895 section_data
->lma
= new_request
->begin
;
1896 section_data
->buffer
= buffer
;
1898 bfd_get_section_contents (abfd
, asec
, buffer
, 0, size
);
1901 /* Clean up an entire memory request vector, including load
1902 data and progress records. */
1905 clear_memory_write_data (void *arg
)
1907 VEC(memory_write_request_s
) **vec_p
= arg
;
1908 VEC(memory_write_request_s
) *vec
= *vec_p
;
1910 struct memory_write_request
*mr
;
1912 for (i
= 0; VEC_iterate (memory_write_request_s
, vec
, i
, mr
); ++i
)
1917 VEC_free (memory_write_request_s
, vec
);
1921 generic_load (char *args
, int from_tty
)
1924 struct timeval start_time
, end_time
;
1926 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
1927 struct load_section_data cbdata
;
1928 struct load_progress_data total_progress
;
1933 memset (&cbdata
, 0, sizeof (cbdata
));
1934 memset (&total_progress
, 0, sizeof (total_progress
));
1935 cbdata
.progress_data
= &total_progress
;
1937 make_cleanup (clear_memory_write_data
, &cbdata
.requests
);
1939 argv
= buildargv (args
);
1944 make_cleanup_freeargv (argv
);
1946 filename
= tilde_expand (argv
[0]);
1947 make_cleanup (xfree
, filename
);
1949 if (argv
[1] != NULL
)
1953 cbdata
.load_offset
= strtoul (argv
[1], &endptr
, 0);
1955 /* If the last word was not a valid number then
1956 treat it as a file name with spaces in. */
1957 if (argv
[1] == endptr
)
1958 error (_("Invalid download offset:%s."), argv
[1]);
1960 if (argv
[2] != NULL
)
1961 error (_("Too many parameters."));
1964 /* Open the file for loading. */
1965 loadfile_bfd
= bfd_openr (filename
, gnutarget
);
1966 if (loadfile_bfd
== NULL
)
1968 perror_with_name (filename
);
1972 /* FIXME: should be checking for errors from bfd_close (for one thing,
1973 on error it does not free all the storage associated with the
1975 make_cleanup_bfd_close (loadfile_bfd
);
1977 if (!bfd_check_format (loadfile_bfd
, bfd_object
))
1979 error (_("\"%s\" is not an object file: %s"), filename
,
1980 bfd_errmsg (bfd_get_error ()));
1983 bfd_map_over_sections (loadfile_bfd
, add_section_size_callback
,
1984 (void *) &total_progress
.total_size
);
1986 bfd_map_over_sections (loadfile_bfd
, load_section_callback
, &cbdata
);
1988 gettimeofday (&start_time
, NULL
);
1990 if (target_write_memory_blocks (cbdata
.requests
, flash_discard
,
1991 load_progress
) != 0)
1992 error (_("Load failed"));
1994 gettimeofday (&end_time
, NULL
);
1996 entry
= bfd_get_start_address (loadfile_bfd
);
1997 ui_out_text (uiout
, "Start address ");
1998 ui_out_field_fmt (uiout
, "address", "0x%s", paddr_nz (entry
));
1999 ui_out_text (uiout
, ", load size ");
2000 ui_out_field_fmt (uiout
, "load-size", "%lu", total_progress
.data_count
);
2001 ui_out_text (uiout
, "\n");
2002 /* We were doing this in remote-mips.c, I suspect it is right
2003 for other targets too. */
2006 /* FIXME: are we supposed to call symbol_file_add or not? According
2007 to a comment from remote-mips.c (where a call to symbol_file_add
2008 was commented out), making the call confuses GDB if more than one
2009 file is loaded in. Some targets do (e.g., remote-vx.c) but
2010 others don't (or didn't - perhaps they have all been deleted). */
2012 print_transfer_performance (gdb_stdout
, total_progress
.data_count
,
2013 total_progress
.write_count
,
2014 &start_time
, &end_time
);
2016 do_cleanups (old_cleanups
);
2019 /* Report how fast the transfer went. */
2021 /* DEPRECATED: cagney/1999-10-18: report_transfer_performance is being
2022 replaced by print_transfer_performance (with a very different
2023 function signature). */
2026 report_transfer_performance (unsigned long data_count
, time_t start_time
,
2029 struct timeval start
, end
;
2031 start
.tv_sec
= start_time
;
2033 end
.tv_sec
= end_time
;
2036 print_transfer_performance (gdb_stdout
, data_count
, 0, &start
, &end
);
2040 print_transfer_performance (struct ui_file
*stream
,
2041 unsigned long data_count
,
2042 unsigned long write_count
,
2043 const struct timeval
*start_time
,
2044 const struct timeval
*end_time
)
2046 ULONGEST time_count
;
2048 /* Compute the elapsed time in milliseconds, as a tradeoff between
2049 accuracy and overflow. */
2050 time_count
= (end_time
->tv_sec
- start_time
->tv_sec
) * 1000;
2051 time_count
+= (end_time
->tv_usec
- start_time
->tv_usec
) / 1000;
2053 ui_out_text (uiout
, "Transfer rate: ");
2056 unsigned long rate
= ((ULONGEST
) data_count
* 1000) / time_count
;
2058 if (ui_out_is_mi_like_p (uiout
))
2060 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
* 8);
2061 ui_out_text (uiout
, " bits/sec");
2063 else if (rate
< 1024)
2065 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
);
2066 ui_out_text (uiout
, " bytes/sec");
2070 ui_out_field_fmt (uiout
, "transfer-rate", "%lu", rate
/ 1024);
2071 ui_out_text (uiout
, " KB/sec");
2076 ui_out_field_fmt (uiout
, "transferred-bits", "%lu", (data_count
* 8));
2077 ui_out_text (uiout
, " bits in <1 sec");
2079 if (write_count
> 0)
2081 ui_out_text (uiout
, ", ");
2082 ui_out_field_fmt (uiout
, "write-rate", "%lu", data_count
/ write_count
);
2083 ui_out_text (uiout
, " bytes/write");
2085 ui_out_text (uiout
, ".\n");
2088 /* This function allows the addition of incrementally linked object files.
2089 It does not modify any state in the target, only in the debugger. */
2090 /* Note: ezannoni 2000-04-13 This function/command used to have a
2091 special case syntax for the rombug target (Rombug is the boot
2092 monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the
2093 rombug case, the user doesn't need to supply a text address,
2094 instead a call to target_link() (in target.c) would supply the
2095 value to use. We are now discontinuing this type of ad hoc syntax. */
2098 add_symbol_file_command (char *args
, int from_tty
)
2100 char *filename
= NULL
;
2101 int flags
= OBJF_USERLOADED
;
2103 int expecting_option
= 0;
2104 int section_index
= 0;
2108 int expecting_sec_name
= 0;
2109 int expecting_sec_addr
= 0;
2118 struct section_addr_info
*section_addrs
;
2119 struct sect_opt
*sect_opts
= NULL
;
2120 size_t num_sect_opts
= 0;
2121 struct cleanup
*my_cleanups
= make_cleanup (null_cleanup
, NULL
);
2124 sect_opts
= (struct sect_opt
*) xmalloc (num_sect_opts
2125 * sizeof (struct sect_opt
));
2130 error (_("add-symbol-file takes a file name and an address"));
2132 argv
= buildargv (args
);
2133 make_cleanup_freeargv (argv
);
2138 for (arg
= argv
[0], argcnt
= 0; arg
!= NULL
; arg
= argv
[++argcnt
])
2140 /* Process the argument. */
2143 /* The first argument is the file name. */
2144 filename
= tilde_expand (arg
);
2145 make_cleanup (xfree
, filename
);
2150 /* The second argument is always the text address at which
2151 to load the program. */
2152 sect_opts
[section_index
].name
= ".text";
2153 sect_opts
[section_index
].value
= arg
;
2154 if (++section_index
>= num_sect_opts
)
2157 sect_opts
= ((struct sect_opt
*)
2158 xrealloc (sect_opts
,
2160 * sizeof (struct sect_opt
)));
2165 /* It's an option (starting with '-') or it's an argument
2170 if (strcmp (arg
, "-readnow") == 0)
2171 flags
|= OBJF_READNOW
;
2172 else if (strcmp (arg
, "-s") == 0)
2174 expecting_sec_name
= 1;
2175 expecting_sec_addr
= 1;
2180 if (expecting_sec_name
)
2182 sect_opts
[section_index
].name
= arg
;
2183 expecting_sec_name
= 0;
2186 if (expecting_sec_addr
)
2188 sect_opts
[section_index
].value
= arg
;
2189 expecting_sec_addr
= 0;
2190 if (++section_index
>= num_sect_opts
)
2193 sect_opts
= ((struct sect_opt
*)
2194 xrealloc (sect_opts
,
2196 * sizeof (struct sect_opt
)));
2200 error (_("USAGE: add-symbol-file <filename> <textaddress> [-mapped] [-readnow] [-s <secname> <addr>]*"));
2205 /* This command takes at least two arguments. The first one is a
2206 filename, and the second is the address where this file has been
2207 loaded. Abort now if this address hasn't been provided by the
2209 if (section_index
< 1)
2210 error (_("The address where %s has been loaded is missing"), filename
);
2212 /* Print the prompt for the query below. And save the arguments into
2213 a sect_addr_info structure to be passed around to other
2214 functions. We have to split this up into separate print
2215 statements because hex_string returns a local static
2218 printf_unfiltered (_("add symbol table from file \"%s\" at\n"), filename
);
2219 section_addrs
= alloc_section_addr_info (section_index
);
2220 make_cleanup (xfree
, section_addrs
);
2221 for (i
= 0; i
< section_index
; i
++)
2224 char *val
= sect_opts
[i
].value
;
2225 char *sec
= sect_opts
[i
].name
;
2227 addr
= parse_and_eval_address (val
);
2229 /* Here we store the section offsets in the order they were
2230 entered on the command line. */
2231 section_addrs
->other
[sec_num
].name
= sec
;
2232 section_addrs
->other
[sec_num
].addr
= addr
;
2233 printf_unfiltered ("\t%s_addr = %s\n", sec
, paddress (addr
));
2236 /* The object's sections are initialized when a
2237 call is made to build_objfile_section_table (objfile).
2238 This happens in reread_symbols.
2239 At this point, we don't know what file type this is,
2240 so we can't determine what section names are valid. */
2243 if (from_tty
&& (!query ("%s", "")))
2244 error (_("Not confirmed."));
2246 symbol_file_add (filename
, from_tty
, section_addrs
, 0, flags
);
2248 /* Getting new symbols may change our opinion about what is
2250 reinit_frame_cache ();
2251 do_cleanups (my_cleanups
);
2255 add_shared_symbol_files_command (char *args
, int from_tty
)
2257 #ifdef ADD_SHARED_SYMBOL_FILES
2258 ADD_SHARED_SYMBOL_FILES (args
, from_tty
);
2260 error (_("This command is not available in this configuration of GDB."));
2264 /* Re-read symbols if a symbol-file has changed. */
2266 reread_symbols (void)
2268 struct objfile
*objfile
;
2271 struct stat new_statbuf
;
2274 /* With the addition of shared libraries, this should be modified,
2275 the load time should be saved in the partial symbol tables, since
2276 different tables may come from different source files. FIXME.
2277 This routine should then walk down each partial symbol table
2278 and see if the symbol table that it originates from has been changed */
2280 for (objfile
= object_files
; objfile
; objfile
= objfile
->next
)
2284 #ifdef DEPRECATED_IBM6000_TARGET
2285 /* If this object is from a shared library, then you should
2286 stat on the library name, not member name. */
2288 if (objfile
->obfd
->my_archive
)
2289 res
= stat (objfile
->obfd
->my_archive
->filename
, &new_statbuf
);
2292 res
= stat (objfile
->name
, &new_statbuf
);
2295 /* FIXME, should use print_sys_errmsg but it's not filtered. */
2296 printf_unfiltered (_("`%s' has disappeared; keeping its symbols.\n"),
2300 new_modtime
= new_statbuf
.st_mtime
;
2301 if (new_modtime
!= objfile
->mtime
)
2303 struct cleanup
*old_cleanups
;
2304 struct section_offsets
*offsets
;
2306 char *obfd_filename
;
2308 printf_unfiltered (_("`%s' has changed; re-reading symbols.\n"),
2311 /* There are various functions like symbol_file_add,
2312 symfile_bfd_open, syms_from_objfile, etc., which might
2313 appear to do what we want. But they have various other
2314 effects which we *don't* want. So we just do stuff
2315 ourselves. We don't worry about mapped files (for one thing,
2316 any mapped file will be out of date). */
2318 /* If we get an error, blow away this objfile (not sure if
2319 that is the correct response for things like shared
2321 old_cleanups
= make_cleanup_free_objfile (objfile
);
2322 /* We need to do this whenever any symbols go away. */
2323 make_cleanup (clear_symtab_users_cleanup
, 0 /*ignore*/);
2325 if (exec_bfd
!= NULL
&& strcmp (bfd_get_filename (objfile
->obfd
),
2326 bfd_get_filename (exec_bfd
)) == 0)
2328 /* Reload EXEC_BFD without asking anything. */
2330 exec_file_attach (bfd_get_filename (objfile
->obfd
), 0);
2333 /* Clean up any state BFD has sitting around. We don't need
2334 to close the descriptor but BFD lacks a way of closing the
2335 BFD without closing the descriptor. */
2336 obfd_filename
= bfd_get_filename (objfile
->obfd
);
2337 if (!bfd_close (objfile
->obfd
))
2338 error (_("Can't close BFD for %s: %s"), objfile
->name
,
2339 bfd_errmsg (bfd_get_error ()));
2340 if (remote_filename_p (obfd_filename
))
2341 objfile
->obfd
= remote_bfd_open (obfd_filename
, gnutarget
);
2343 objfile
->obfd
= bfd_openr (obfd_filename
, gnutarget
);
2344 if (objfile
->obfd
== NULL
)
2345 error (_("Can't open %s to read symbols."), objfile
->name
);
2346 /* bfd_openr sets cacheable to true, which is what we want. */
2347 if (!bfd_check_format (objfile
->obfd
, bfd_object
))
2348 error (_("Can't read symbols from %s: %s."), objfile
->name
,
2349 bfd_errmsg (bfd_get_error ()));
2351 /* Save the offsets, we will nuke them with the rest of the
2353 num_offsets
= objfile
->num_sections
;
2354 offsets
= ((struct section_offsets
*)
2355 alloca (SIZEOF_N_SECTION_OFFSETS (num_offsets
)));
2356 memcpy (offsets
, objfile
->section_offsets
,
2357 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2359 /* Remove any references to this objfile in the global
2361 preserve_values (objfile
);
2363 /* Nuke all the state that we will re-read. Much of the following
2364 code which sets things to NULL really is necessary to tell
2365 other parts of GDB that there is nothing currently there. */
2367 /* FIXME: Do we have to free a whole linked list, or is this
2369 if (objfile
->global_psymbols
.list
)
2370 xfree (objfile
->global_psymbols
.list
);
2371 memset (&objfile
->global_psymbols
, 0,
2372 sizeof (objfile
->global_psymbols
));
2373 if (objfile
->static_psymbols
.list
)
2374 xfree (objfile
->static_psymbols
.list
);
2375 memset (&objfile
->static_psymbols
, 0,
2376 sizeof (objfile
->static_psymbols
));
2378 /* Free the obstacks for non-reusable objfiles */
2379 bcache_xfree (objfile
->psymbol_cache
);
2380 objfile
->psymbol_cache
= bcache_xmalloc ();
2381 bcache_xfree (objfile
->macro_cache
);
2382 objfile
->macro_cache
= bcache_xmalloc ();
2383 if (objfile
->demangled_names_hash
!= NULL
)
2385 htab_delete (objfile
->demangled_names_hash
);
2386 objfile
->demangled_names_hash
= NULL
;
2388 obstack_free (&objfile
->objfile_obstack
, 0);
2389 objfile
->sections
= NULL
;
2390 objfile
->symtabs
= NULL
;
2391 objfile
->psymtabs
= NULL
;
2392 objfile
->free_psymtabs
= NULL
;
2393 objfile
->cp_namespace_symtab
= NULL
;
2394 objfile
->msymbols
= NULL
;
2395 objfile
->deprecated_sym_private
= NULL
;
2396 objfile
->minimal_symbol_count
= 0;
2397 memset (&objfile
->msymbol_hash
, 0,
2398 sizeof (objfile
->msymbol_hash
));
2399 memset (&objfile
->msymbol_demangled_hash
, 0,
2400 sizeof (objfile
->msymbol_demangled_hash
));
2401 clear_objfile_data (objfile
);
2402 if (objfile
->sf
!= NULL
)
2404 (*objfile
->sf
->sym_finish
) (objfile
);
2407 objfile
->psymbol_cache
= bcache_xmalloc ();
2408 objfile
->macro_cache
= bcache_xmalloc ();
2409 /* obstack_init also initializes the obstack so it is
2410 empty. We could use obstack_specify_allocation but
2411 gdb_obstack.h specifies the alloc/dealloc
2413 obstack_init (&objfile
->objfile_obstack
);
2414 if (build_objfile_section_table (objfile
))
2416 error (_("Can't find the file sections in `%s': %s"),
2417 objfile
->name
, bfd_errmsg (bfd_get_error ()));
2419 terminate_minimal_symbol_table (objfile
);
2421 /* We use the same section offsets as from last time. I'm not
2422 sure whether that is always correct for shared libraries. */
2423 objfile
->section_offsets
= (struct section_offsets
*)
2424 obstack_alloc (&objfile
->objfile_obstack
,
2425 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2426 memcpy (objfile
->section_offsets
, offsets
,
2427 SIZEOF_N_SECTION_OFFSETS (num_offsets
));
2428 objfile
->num_sections
= num_offsets
;
2430 /* What the hell is sym_new_init for, anyway? The concept of
2431 distinguishing between the main file and additional files
2432 in this way seems rather dubious. */
2433 if (objfile
== symfile_objfile
)
2435 (*objfile
->sf
->sym_new_init
) (objfile
);
2438 (*objfile
->sf
->sym_init
) (objfile
);
2439 clear_complaints (&symfile_complaints
, 1, 1);
2440 /* The "mainline" parameter is a hideous hack; I think leaving it
2441 zero is OK since dbxread.c also does what it needs to do if
2442 objfile->global_psymbols.size is 0. */
2443 (*objfile
->sf
->sym_read
) (objfile
, 0);
2444 if (!have_partial_symbols () && !have_full_symbols ())
2447 printf_unfiltered (_("(no debugging symbols found)\n"));
2450 objfile
->flags
|= OBJF_SYMS
;
2452 /* We're done reading the symbol file; finish off complaints. */
2453 clear_complaints (&symfile_complaints
, 0, 1);
2455 /* Getting new symbols may change our opinion about what is
2458 reinit_frame_cache ();
2460 /* Discard cleanups as symbol reading was successful. */
2461 discard_cleanups (old_cleanups
);
2463 /* If the mtime has changed between the time we set new_modtime
2464 and now, we *want* this to be out of date, so don't call stat
2466 objfile
->mtime
= new_modtime
;
2468 reread_separate_symbols (objfile
);
2469 init_entry_point_info (objfile
);
2476 clear_symtab_users ();
2477 /* At least one objfile has changed, so we can consider that
2478 the executable we're debugging has changed too. */
2479 observer_notify_executable_changed ();
2485 /* Handle separate debug info for OBJFILE, which has just been
2487 - If we had separate debug info before, but now we don't, get rid
2488 of the separated objfile.
2489 - If we didn't have separated debug info before, but now we do,
2490 read in the new separated debug info file.
2491 - If the debug link points to a different file, toss the old one
2492 and read the new one.
2493 This function does *not* handle the case where objfile is still
2494 using the same separate debug info file, but that file's timestamp
2495 has changed. That case should be handled by the loop in
2496 reread_symbols already. */
2498 reread_separate_symbols (struct objfile
*objfile
)
2501 unsigned long crc32
;
2503 /* Does the updated objfile's debug info live in a
2505 debug_file
= find_separate_debug_file (objfile
);
2507 if (objfile
->separate_debug_objfile
)
2509 /* There are two cases where we need to get rid of
2510 the old separated debug info objfile:
2511 - if the new primary objfile doesn't have
2512 separated debug info, or
2513 - if the new primary objfile has separate debug
2514 info, but it's under a different filename.
2516 If the old and new objfiles both have separate
2517 debug info, under the same filename, then we're
2518 okay --- if the separated file's contents have
2519 changed, we will have caught that when we
2520 visited it in this function's outermost
2523 || strcmp (debug_file
, objfile
->separate_debug_objfile
->name
) != 0)
2524 free_objfile (objfile
->separate_debug_objfile
);
2527 /* If the new objfile has separate debug info, and we
2528 haven't loaded it already, do so now. */
2530 && ! objfile
->separate_debug_objfile
)
2532 /* Use the same section offset table as objfile itself.
2533 Preserve the flags from objfile that make sense. */
2534 objfile
->separate_debug_objfile
2535 = (symbol_file_add_with_addrs_or_offsets
2536 (symfile_bfd_open (debug_file
),
2537 info_verbose
, /* from_tty: Don't override the default. */
2538 0, /* No addr table. */
2539 objfile
->section_offsets
, objfile
->num_sections
,
2540 0, /* Not mainline. See comments about this above. */
2541 objfile
->flags
& (OBJF_REORDERED
| OBJF_SHARED
| OBJF_READNOW
2542 | OBJF_USERLOADED
)));
2543 objfile
->separate_debug_objfile
->separate_debug_objfile_backlink
2561 static filename_language
*filename_language_table
;
2562 static int fl_table_size
, fl_table_next
;
2565 add_filename_language (char *ext
, enum language lang
)
2567 if (fl_table_next
>= fl_table_size
)
2569 fl_table_size
+= 10;
2570 filename_language_table
=
2571 xrealloc (filename_language_table
,
2572 fl_table_size
* sizeof (*filename_language_table
));
2575 filename_language_table
[fl_table_next
].ext
= xstrdup (ext
);
2576 filename_language_table
[fl_table_next
].lang
= lang
;
2580 static char *ext_args
;
2582 show_ext_args (struct ui_file
*file
, int from_tty
,
2583 struct cmd_list_element
*c
, const char *value
)
2585 fprintf_filtered (file
, _("\
2586 Mapping between filename extension and source language is \"%s\".\n"),
2591 set_ext_lang_command (char *args
, int from_tty
, struct cmd_list_element
*e
)
2594 char *cp
= ext_args
;
2597 /* First arg is filename extension, starting with '.' */
2599 error (_("'%s': Filename extension must begin with '.'"), ext_args
);
2601 /* Find end of first arg. */
2602 while (*cp
&& !isspace (*cp
))
2606 error (_("'%s': two arguments required -- filename extension and language"),
2609 /* Null-terminate first arg */
2612 /* Find beginning of second arg, which should be a source language. */
2613 while (*cp
&& isspace (*cp
))
2617 error (_("'%s': two arguments required -- filename extension and language"),
2620 /* Lookup the language from among those we know. */
2621 lang
= language_enum (cp
);
2623 /* Now lookup the filename extension: do we already know it? */
2624 for (i
= 0; i
< fl_table_next
; i
++)
2625 if (0 == strcmp (ext_args
, filename_language_table
[i
].ext
))
2628 if (i
>= fl_table_next
)
2630 /* new file extension */
2631 add_filename_language (ext_args
, lang
);
2635 /* redefining a previously known filename extension */
2638 /* query ("Really make files of type %s '%s'?", */
2639 /* ext_args, language_str (lang)); */
2641 xfree (filename_language_table
[i
].ext
);
2642 filename_language_table
[i
].ext
= xstrdup (ext_args
);
2643 filename_language_table
[i
].lang
= lang
;
2648 info_ext_lang_command (char *args
, int from_tty
)
2652 printf_filtered (_("Filename extensions and the languages they represent:"));
2653 printf_filtered ("\n\n");
2654 for (i
= 0; i
< fl_table_next
; i
++)
2655 printf_filtered ("\t%s\t- %s\n",
2656 filename_language_table
[i
].ext
,
2657 language_str (filename_language_table
[i
].lang
));
2661 init_filename_language_table (void)
2663 if (fl_table_size
== 0) /* protect against repetition */
2667 filename_language_table
=
2668 xmalloc (fl_table_size
* sizeof (*filename_language_table
));
2669 add_filename_language (".c", language_c
);
2670 add_filename_language (".C", language_cplus
);
2671 add_filename_language (".cc", language_cplus
);
2672 add_filename_language (".cp", language_cplus
);
2673 add_filename_language (".cpp", language_cplus
);
2674 add_filename_language (".cxx", language_cplus
);
2675 add_filename_language (".c++", language_cplus
);
2676 add_filename_language (".java", language_java
);
2677 add_filename_language (".class", language_java
);
2678 add_filename_language (".m", language_objc
);
2679 add_filename_language (".f", language_fortran
);
2680 add_filename_language (".F", language_fortran
);
2681 add_filename_language (".s", language_asm
);
2682 add_filename_language (".sx", language_asm
);
2683 add_filename_language (".S", language_asm
);
2684 add_filename_language (".pas", language_pascal
);
2685 add_filename_language (".p", language_pascal
);
2686 add_filename_language (".pp", language_pascal
);
2687 add_filename_language (".adb", language_ada
);
2688 add_filename_language (".ads", language_ada
);
2689 add_filename_language (".a", language_ada
);
2690 add_filename_language (".ada", language_ada
);
2695 deduce_language_from_filename (char *filename
)
2700 if (filename
!= NULL
)
2701 if ((cp
= strrchr (filename
, '.')) != NULL
)
2702 for (i
= 0; i
< fl_table_next
; i
++)
2703 if (strcmp (cp
, filename_language_table
[i
].ext
) == 0)
2704 return filename_language_table
[i
].lang
;
2706 return language_unknown
;
2711 Allocate and partly initialize a new symbol table. Return a pointer
2712 to it. error() if no space.
2714 Caller must set these fields:
2720 possibly free_named_symtabs (symtab->filename);
2724 allocate_symtab (char *filename
, struct objfile
*objfile
)
2726 struct symtab
*symtab
;
2728 symtab
= (struct symtab
*)
2729 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symtab
));
2730 memset (symtab
, 0, sizeof (*symtab
));
2731 symtab
->filename
= obsavestring (filename
, strlen (filename
),
2732 &objfile
->objfile_obstack
);
2733 symtab
->fullname
= NULL
;
2734 symtab
->language
= deduce_language_from_filename (filename
);
2735 symtab
->debugformat
= obsavestring ("unknown", 7,
2736 &objfile
->objfile_obstack
);
2738 /* Hook it to the objfile it comes from */
2740 symtab
->objfile
= objfile
;
2741 symtab
->next
= objfile
->symtabs
;
2742 objfile
->symtabs
= symtab
;
2747 struct partial_symtab
*
2748 allocate_psymtab (char *filename
, struct objfile
*objfile
)
2750 struct partial_symtab
*psymtab
;
2752 if (objfile
->free_psymtabs
)
2754 psymtab
= objfile
->free_psymtabs
;
2755 objfile
->free_psymtabs
= psymtab
->next
;
2758 psymtab
= (struct partial_symtab
*)
2759 obstack_alloc (&objfile
->objfile_obstack
,
2760 sizeof (struct partial_symtab
));
2762 memset (psymtab
, 0, sizeof (struct partial_symtab
));
2763 psymtab
->filename
= obsavestring (filename
, strlen (filename
),
2764 &objfile
->objfile_obstack
);
2765 psymtab
->symtab
= NULL
;
2767 /* Prepend it to the psymtab list for the objfile it belongs to.
2768 Psymtabs are searched in most recent inserted -> least recent
2771 psymtab
->objfile
= objfile
;
2772 psymtab
->next
= objfile
->psymtabs
;
2773 objfile
->psymtabs
= psymtab
;
2776 struct partial_symtab
**prev_pst
;
2777 psymtab
->objfile
= objfile
;
2778 psymtab
->next
= NULL
;
2779 prev_pst
= &(objfile
->psymtabs
);
2780 while ((*prev_pst
) != NULL
)
2781 prev_pst
= &((*prev_pst
)->next
);
2782 (*prev_pst
) = psymtab
;
2790 discard_psymtab (struct partial_symtab
*pst
)
2792 struct partial_symtab
**prev_pst
;
2795 Empty psymtabs happen as a result of header files which don't
2796 have any symbols in them. There can be a lot of them. But this
2797 check is wrong, in that a psymtab with N_SLINE entries but
2798 nothing else is not empty, but we don't realize that. Fixing
2799 that without slowing things down might be tricky. */
2801 /* First, snip it out of the psymtab chain */
2803 prev_pst
= &(pst
->objfile
->psymtabs
);
2804 while ((*prev_pst
) != pst
)
2805 prev_pst
= &((*prev_pst
)->next
);
2806 (*prev_pst
) = pst
->next
;
2808 /* Next, put it on a free list for recycling */
2810 pst
->next
= pst
->objfile
->free_psymtabs
;
2811 pst
->objfile
->free_psymtabs
= pst
;
2815 /* Reset all data structures in gdb which may contain references to symbol
2819 clear_symtab_users (void)
2821 /* Someday, we should do better than this, by only blowing away
2822 the things that really need to be blown. */
2824 /* Clear the "current" symtab first, because it is no longer valid.
2825 breakpoint_re_set may try to access the current symtab. */
2826 clear_current_source_symtab_and_line ();
2829 breakpoint_re_set ();
2830 set_default_breakpoint (0, 0, 0, 0);
2831 clear_pc_function_cache ();
2832 observer_notify_new_objfile (NULL
);
2834 /* Clear globals which might have pointed into a removed objfile.
2835 FIXME: It's not clear which of these are supposed to persist
2836 between expressions and which ought to be reset each time. */
2837 expression_context_block
= NULL
;
2838 innermost_block
= NULL
;
2840 /* Varobj may refer to old symbols, perform a cleanup. */
2841 varobj_invalidate ();
2846 clear_symtab_users_cleanup (void *ignore
)
2848 clear_symtab_users ();
2851 /* clear_symtab_users_once:
2853 This function is run after symbol reading, or from a cleanup.
2854 If an old symbol table was obsoleted, the old symbol table
2855 has been blown away, but the other GDB data structures that may
2856 reference it have not yet been cleared or re-directed. (The old
2857 symtab was zapped, and the cleanup queued, in free_named_symtab()
2860 This function can be queued N times as a cleanup, or called
2861 directly; it will do all the work the first time, and then will be a
2862 no-op until the next time it is queued. This works by bumping a
2863 counter at queueing time. Much later when the cleanup is run, or at
2864 the end of symbol processing (in case the cleanup is discarded), if
2865 the queued count is greater than the "done-count", we do the work
2866 and set the done-count to the queued count. If the queued count is
2867 less than or equal to the done-count, we just ignore the call. This
2868 is needed because reading a single .o file will often replace many
2869 symtabs (one per .h file, for example), and we don't want to reset
2870 the breakpoints N times in the user's face.
2872 The reason we both queue a cleanup, and call it directly after symbol
2873 reading, is because the cleanup protects us in case of errors, but is
2874 discarded if symbol reading is successful. */
2877 /* FIXME: As free_named_symtabs is currently a big noop this function
2878 is no longer needed. */
2879 static void clear_symtab_users_once (void);
2881 static int clear_symtab_users_queued
;
2882 static int clear_symtab_users_done
;
2885 clear_symtab_users_once (void)
2887 /* Enforce once-per-`do_cleanups'-semantics */
2888 if (clear_symtab_users_queued
<= clear_symtab_users_done
)
2890 clear_symtab_users_done
= clear_symtab_users_queued
;
2892 clear_symtab_users ();
2896 /* Delete the specified psymtab, and any others that reference it. */
2899 cashier_psymtab (struct partial_symtab
*pst
)
2901 struct partial_symtab
*ps
, *pprev
= NULL
;
2904 /* Find its previous psymtab in the chain */
2905 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2914 /* Unhook it from the chain. */
2915 if (ps
== pst
->objfile
->psymtabs
)
2916 pst
->objfile
->psymtabs
= ps
->next
;
2918 pprev
->next
= ps
->next
;
2920 /* FIXME, we can't conveniently deallocate the entries in the
2921 partial_symbol lists (global_psymbols/static_psymbols) that
2922 this psymtab points to. These just take up space until all
2923 the psymtabs are reclaimed. Ditto the dependencies list and
2924 filename, which are all in the objfile_obstack. */
2926 /* We need to cashier any psymtab that has this one as a dependency... */
2928 for (ps
= pst
->objfile
->psymtabs
; ps
; ps
= ps
->next
)
2930 for (i
= 0; i
< ps
->number_of_dependencies
; i
++)
2932 if (ps
->dependencies
[i
] == pst
)
2934 cashier_psymtab (ps
);
2935 goto again
; /* Must restart, chain has been munged. */
2942 /* If a symtab or psymtab for filename NAME is found, free it along
2943 with any dependent breakpoints, displays, etc.
2944 Used when loading new versions of object modules with the "add-file"
2945 command. This is only called on the top-level symtab or psymtab's name;
2946 it is not called for subsidiary files such as .h files.
2948 Return value is 1 if we blew away the environment, 0 if not.
2949 FIXME. The return value appears to never be used.
2951 FIXME. I think this is not the best way to do this. We should
2952 work on being gentler to the environment while still cleaning up
2953 all stray pointers into the freed symtab. */
2956 free_named_symtabs (char *name
)
2959 /* FIXME: With the new method of each objfile having it's own
2960 psymtab list, this function needs serious rethinking. In particular,
2961 why was it ever necessary to toss psymtabs with specific compilation
2962 unit filenames, as opposed to all psymtabs from a particular symbol
2964 Well, the answer is that some systems permit reloading of particular
2965 compilation units. We want to blow away any old info about these
2966 compilation units, regardless of which objfiles they arrived in. --gnu. */
2969 struct symtab
*prev
;
2970 struct partial_symtab
*ps
;
2971 struct blockvector
*bv
;
2974 /* We only wack things if the symbol-reload switch is set. */
2975 if (!symbol_reloading
)
2978 /* Some symbol formats have trouble providing file names... */
2979 if (name
== 0 || *name
== '\0')
2982 /* Look for a psymtab with the specified name. */
2985 for (ps
= partial_symtab_list
; ps
; ps
= ps
->next
)
2987 if (strcmp (name
, ps
->filename
) == 0)
2989 cashier_psymtab (ps
); /* Blow it away...and its little dog, too. */
2990 goto again2
; /* Must restart, chain has been munged */
2994 /* Look for a symtab with the specified name. */
2996 for (s
= symtab_list
; s
; s
= s
->next
)
2998 if (strcmp (name
, s
->filename
) == 0)
3005 if (s
== symtab_list
)
3006 symtab_list
= s
->next
;
3008 prev
->next
= s
->next
;
3010 /* For now, queue a delete for all breakpoints, displays, etc., whether
3011 or not they depend on the symtab being freed. This should be
3012 changed so that only those data structures affected are deleted. */
3014 /* But don't delete anything if the symtab is empty.
3015 This test is necessary due to a bug in "dbxread.c" that
3016 causes empty symtabs to be created for N_SO symbols that
3017 contain the pathname of the object file. (This problem
3018 has been fixed in GDB 3.9x). */
3020 bv
= BLOCKVECTOR (s
);
3021 if (BLOCKVECTOR_NBLOCKS (bv
) > 2
3022 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
))
3023 || BLOCK_NSYMS (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)))
3025 complaint (&symfile_complaints
, _("Replacing old symbols for `%s'"),
3027 clear_symtab_users_queued
++;
3028 make_cleanup (clear_symtab_users_once
, 0);
3032 complaint (&symfile_complaints
, _("Empty symbol table found for `%s'"),
3039 /* It is still possible that some breakpoints will be affected
3040 even though no symtab was found, since the file might have
3041 been compiled without debugging, and hence not be associated
3042 with a symtab. In order to handle this correctly, we would need
3043 to keep a list of text address ranges for undebuggable files.
3044 For now, we do nothing, since this is a fairly obscure case. */
3048 /* FIXME, what about the minimal symbol table? */
3055 /* Allocate and partially fill a partial symtab. It will be
3056 completely filled at the end of the symbol list.
3058 FILENAME is the name of the symbol-file we are reading from. */
3060 struct partial_symtab
*
3061 start_psymtab_common (struct objfile
*objfile
,
3062 struct section_offsets
*section_offsets
, char *filename
,
3063 CORE_ADDR textlow
, struct partial_symbol
**global_syms
,
3064 struct partial_symbol
**static_syms
)
3066 struct partial_symtab
*psymtab
;
3068 psymtab
= allocate_psymtab (filename
, objfile
);
3069 psymtab
->section_offsets
= section_offsets
;
3070 psymtab
->textlow
= textlow
;
3071 psymtab
->texthigh
= psymtab
->textlow
; /* default */
3072 psymtab
->globals_offset
= global_syms
- objfile
->global_psymbols
.list
;
3073 psymtab
->statics_offset
= static_syms
- objfile
->static_psymbols
.list
;
3077 /* Helper function, initialises partial symbol structure and stashes
3078 it into objfile's bcache. Note that our caching mechanism will
3079 use all fields of struct partial_symbol to determine hash value of the
3080 structure. In other words, having two symbols with the same name but
3081 different domain (or address) is possible and correct. */
3083 static const struct partial_symbol
*
3084 add_psymbol_to_bcache (char *name
, int namelength
, domain_enum domain
,
3085 enum address_class
class,
3086 long val
, /* Value as a long */
3087 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3088 enum language language
, struct objfile
*objfile
,
3092 /* psymbol is static so that there will be no uninitialized gaps in the
3093 structure which might contain random data, causing cache misses in
3095 static struct partial_symbol psymbol
;
3097 if (name
[namelength
] != '\0')
3099 buf
= alloca (namelength
+ 1);
3100 /* Create local copy of the partial symbol */
3101 memcpy (buf
, name
, namelength
);
3102 buf
[namelength
] = '\0';
3104 /* val and coreaddr are mutually exclusive, one of them *will* be zero */
3107 SYMBOL_VALUE (&psymbol
) = val
;
3111 SYMBOL_VALUE_ADDRESS (&psymbol
) = coreaddr
;
3113 SYMBOL_SECTION (&psymbol
) = 0;
3114 SYMBOL_LANGUAGE (&psymbol
) = language
;
3115 PSYMBOL_DOMAIN (&psymbol
) = domain
;
3116 PSYMBOL_CLASS (&psymbol
) = class;
3118 SYMBOL_SET_NAMES (&psymbol
, buf
, namelength
, objfile
);
3120 /* Stash the partial symbol away in the cache */
3121 return bcache_full (&psymbol
, sizeof (struct partial_symbol
),
3122 objfile
->psymbol_cache
, added
);
3125 /* Helper function, adds partial symbol to the given partial symbol
3129 append_psymbol_to_list (struct psymbol_allocation_list
*list
,
3130 const struct partial_symbol
*psym
,
3131 struct objfile
*objfile
)
3133 if (list
->next
>= list
->list
+ list
->size
)
3134 extend_psymbol_list (list
, objfile
);
3135 *list
->next
++ = (struct partial_symbol
*) psym
;
3136 OBJSTAT (objfile
, n_psyms
++);
3139 /* Add a symbol with a long value to a psymtab.
3140 Since one arg is a struct, we pass in a ptr and deref it (sigh).
3141 Return the partial symbol that has been added. */
3143 /* NOTE: carlton/2003-09-11: The reason why we return the partial
3144 symbol is so that callers can get access to the symbol's demangled
3145 name, which they don't have any cheap way to determine otherwise.
3146 (Currenly, dwarf2read.c is the only file who uses that information,
3147 though it's possible that other readers might in the future.)
3148 Elena wasn't thrilled about that, and I don't blame her, but we
3149 couldn't come up with a better way to get that information. If
3150 it's needed in other situations, we could consider breaking up
3151 SYMBOL_SET_NAMES to provide access to the demangled name lookup
3154 const struct partial_symbol
*
3155 add_psymbol_to_list (char *name
, int namelength
, domain_enum domain
,
3156 enum address_class
class,
3157 struct psymbol_allocation_list
*list
,
3158 long val
, /* Value as a long */
3159 CORE_ADDR coreaddr
, /* Value as a CORE_ADDR */
3160 enum language language
, struct objfile
*objfile
)
3162 const struct partial_symbol
*psym
;
3166 /* Stash the partial symbol away in the cache */
3167 psym
= add_psymbol_to_bcache (name
, namelength
, domain
, class,
3168 val
, coreaddr
, language
, objfile
, &added
);
3170 /* Do not duplicate global partial symbols. */
3171 if (list
== &objfile
->global_psymbols
3175 /* Save pointer to partial symbol in psymtab, growing symtab if needed. */
3176 append_psymbol_to_list (list
, psym
, objfile
);
3180 /* Initialize storage for partial symbols. */
3183 init_psymbol_list (struct objfile
*objfile
, int total_symbols
)
3185 /* Free any previously allocated psymbol lists. */
3187 if (objfile
->global_psymbols
.list
)
3189 xfree (objfile
->global_psymbols
.list
);
3191 if (objfile
->static_psymbols
.list
)
3193 xfree (objfile
->static_psymbols
.list
);
3196 /* Current best guess is that approximately a twentieth
3197 of the total symbols (in a debugging file) are global or static
3200 objfile
->global_psymbols
.size
= total_symbols
/ 10;
3201 objfile
->static_psymbols
.size
= total_symbols
/ 10;
3203 if (objfile
->global_psymbols
.size
> 0)
3205 objfile
->global_psymbols
.next
=
3206 objfile
->global_psymbols
.list
= (struct partial_symbol
**)
3207 xmalloc ((objfile
->global_psymbols
.size
3208 * sizeof (struct partial_symbol
*)));
3210 if (objfile
->static_psymbols
.size
> 0)
3212 objfile
->static_psymbols
.next
=
3213 objfile
->static_psymbols
.list
= (struct partial_symbol
**)
3214 xmalloc ((objfile
->static_psymbols
.size
3215 * sizeof (struct partial_symbol
*)));
3220 The following code implements an abstraction for debugging overlay sections.
3222 The target model is as follows:
3223 1) The gnu linker will permit multiple sections to be mapped into the
3224 same VMA, each with its own unique LMA (or load address).
3225 2) It is assumed that some runtime mechanism exists for mapping the
3226 sections, one by one, from the load address into the VMA address.
3227 3) This code provides a mechanism for gdb to keep track of which
3228 sections should be considered to be mapped from the VMA to the LMA.
3229 This information is used for symbol lookup, and memory read/write.
3230 For instance, if a section has been mapped then its contents
3231 should be read from the VMA, otherwise from the LMA.
3233 Two levels of debugger support for overlays are available. One is
3234 "manual", in which the debugger relies on the user to tell it which
3235 overlays are currently mapped. This level of support is
3236 implemented entirely in the core debugger, and the information about
3237 whether a section is mapped is kept in the objfile->obj_section table.
3239 The second level of support is "automatic", and is only available if
3240 the target-specific code provides functionality to read the target's
3241 overlay mapping table, and translate its contents for the debugger
3242 (by updating the mapped state information in the obj_section tables).
3244 The interface is as follows:
3246 overlay map <name> -- tell gdb to consider this section mapped
3247 overlay unmap <name> -- tell gdb to consider this section unmapped
3248 overlay list -- list the sections that GDB thinks are mapped
3249 overlay read-target -- get the target's state of what's mapped
3250 overlay off/manual/auto -- set overlay debugging state
3251 Functional interface:
3252 find_pc_mapped_section(pc): if the pc is in the range of a mapped
3253 section, return that section.
3254 find_pc_overlay(pc): find any overlay section that contains
3255 the pc, either in its VMA or its LMA
3256 overlay_is_mapped(sect): true if overlay is marked as mapped
3257 section_is_overlay(sect): true if section's VMA != LMA
3258 pc_in_mapped_range(pc,sec): true if pc belongs to section's VMA
3259 pc_in_unmapped_range(...): true if pc belongs to section's LMA
3260 sections_overlap(sec1, sec2): true if mapped sec1 and sec2 ranges overlap
3261 overlay_mapped_address(...): map an address from section's LMA to VMA
3262 overlay_unmapped_address(...): map an address from section's VMA to LMA
3263 symbol_overlayed_address(...): Return a "current" address for symbol:
3264 either in VMA or LMA depending on whether
3265 the symbol's section is currently mapped
3268 /* Overlay debugging state: */
3270 enum overlay_debugging_state overlay_debugging
= ovly_off
;
3271 int overlay_cache_invalid
= 0; /* True if need to refresh mapped state */
3273 /* Function: section_is_overlay (SECTION)
3274 Returns true if SECTION has VMA not equal to LMA, ie.
3275 SECTION is loaded at an address different from where it will "run". */
3278 section_is_overlay (asection
*section
)
3280 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3282 if (overlay_debugging
)
3283 if (section
&& section
->lma
!= 0 &&
3284 section
->vma
!= section
->lma
)
3290 /* Function: overlay_invalidate_all (void)
3291 Invalidate the mapped state of all overlay sections (mark it as stale). */
3294 overlay_invalidate_all (void)
3296 struct objfile
*objfile
;
3297 struct obj_section
*sect
;
3299 ALL_OBJSECTIONS (objfile
, sect
)
3300 if (section_is_overlay (sect
->the_bfd_section
))
3301 sect
->ovly_mapped
= -1;
3304 /* Function: overlay_is_mapped (SECTION)
3305 Returns true if section is an overlay, and is currently mapped.
3306 Private: public access is thru function section_is_mapped.
3308 Access to the ovly_mapped flag is restricted to this function, so
3309 that we can do automatic update. If the global flag
3310 OVERLAY_CACHE_INVALID is set (by wait_for_inferior), then call
3311 overlay_invalidate_all. If the mapped state of the particular
3312 section is stale, then call TARGET_OVERLAY_UPDATE to refresh it. */
3315 overlay_is_mapped (struct obj_section
*osect
)
3317 if (osect
== 0 || !section_is_overlay (osect
->the_bfd_section
))
3320 switch (overlay_debugging
)
3324 return 0; /* overlay debugging off */
3325 case ovly_auto
: /* overlay debugging automatic */
3326 /* Unles there is a gdbarch_overlay_update function,
3327 there's really nothing useful to do here (can't really go auto) */
3328 if (gdbarch_overlay_update_p (current_gdbarch
))
3330 if (overlay_cache_invalid
)
3332 overlay_invalidate_all ();
3333 overlay_cache_invalid
= 0;
3335 if (osect
->ovly_mapped
== -1)
3336 gdbarch_overlay_update (current_gdbarch
, osect
);
3338 /* fall thru to manual case */
3339 case ovly_on
: /* overlay debugging manual */
3340 return osect
->ovly_mapped
== 1;
3344 /* Function: section_is_mapped
3345 Returns true if section is an overlay, and is currently mapped. */
3348 section_is_mapped (asection
*section
)
3350 struct objfile
*objfile
;
3351 struct obj_section
*osect
;
3353 if (overlay_debugging
)
3354 if (section
&& section_is_overlay (section
))
3355 ALL_OBJSECTIONS (objfile
, osect
)
3356 if (osect
->the_bfd_section
== section
)
3357 return overlay_is_mapped (osect
);
3362 /* Function: pc_in_unmapped_range
3363 If PC falls into the lma range of SECTION, return true, else false. */
3366 pc_in_unmapped_range (CORE_ADDR pc
, asection
*section
)
3368 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3372 if (overlay_debugging
)
3373 if (section
&& section_is_overlay (section
))
3375 size
= bfd_get_section_size (section
);
3376 if (section
->lma
<= pc
&& pc
< section
->lma
+ size
)
3382 /* Function: pc_in_mapped_range
3383 If PC falls into the vma range of SECTION, return true, else false. */
3386 pc_in_mapped_range (CORE_ADDR pc
, asection
*section
)
3388 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3392 if (overlay_debugging
)
3393 if (section
&& section_is_overlay (section
))
3395 size
= bfd_get_section_size (section
);
3396 if (section
->vma
<= pc
&& pc
< section
->vma
+ size
)
3403 /* Return true if the mapped ranges of sections A and B overlap, false
3406 sections_overlap (asection
*a
, asection
*b
)
3408 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3410 CORE_ADDR a_start
= a
->vma
;
3411 CORE_ADDR a_end
= a
->vma
+ bfd_get_section_size (a
);
3412 CORE_ADDR b_start
= b
->vma
;
3413 CORE_ADDR b_end
= b
->vma
+ bfd_get_section_size (b
);
3415 return (a_start
< b_end
&& b_start
< a_end
);
3418 /* Function: overlay_unmapped_address (PC, SECTION)
3419 Returns the address corresponding to PC in the unmapped (load) range.
3420 May be the same as PC. */
3423 overlay_unmapped_address (CORE_ADDR pc
, asection
*section
)
3425 /* FIXME: need bfd *, so we can use bfd_section_lma methods. */
3427 if (overlay_debugging
)
3428 if (section
&& section_is_overlay (section
) &&
3429 pc_in_mapped_range (pc
, section
))
3430 return pc
+ section
->lma
- section
->vma
;
3435 /* Function: overlay_mapped_address (PC, SECTION)
3436 Returns the address corresponding to PC in the mapped (runtime) range.
3437 May be the same as PC. */
3440 overlay_mapped_address (CORE_ADDR pc
, asection
*section
)
3442 /* FIXME: need bfd *, so we can use bfd_section_vma methods. */
3444 if (overlay_debugging
)
3445 if (section
&& section_is_overlay (section
) &&
3446 pc_in_unmapped_range (pc
, section
))
3447 return pc
+ section
->vma
- section
->lma
;
3453 /* Function: symbol_overlayed_address
3454 Return one of two addresses (relative to the VMA or to the LMA),
3455 depending on whether the section is mapped or not. */
3458 symbol_overlayed_address (CORE_ADDR address
, asection
*section
)
3460 if (overlay_debugging
)
3462 /* If the symbol has no section, just return its regular address. */
3465 /* If the symbol's section is not an overlay, just return its address */
3466 if (!section_is_overlay (section
))
3468 /* If the symbol's section is mapped, just return its address */
3469 if (section_is_mapped (section
))
3472 * HOWEVER: if the symbol is in an overlay section which is NOT mapped,
3473 * then return its LOADED address rather than its vma address!!
3475 return overlay_unmapped_address (address
, section
);
3480 /* Function: find_pc_overlay (PC)
3481 Return the best-match overlay section for PC:
3482 If PC matches a mapped overlay section's VMA, return that section.
3483 Else if PC matches an unmapped section's VMA, return that section.
3484 Else if PC matches an unmapped section's LMA, return that section. */
3487 find_pc_overlay (CORE_ADDR pc
)
3489 struct objfile
*objfile
;
3490 struct obj_section
*osect
, *best_match
= NULL
;
3492 if (overlay_debugging
)
3493 ALL_OBJSECTIONS (objfile
, osect
)
3494 if (section_is_overlay (osect
->the_bfd_section
))
3496 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
))
3498 if (overlay_is_mapped (osect
))
3499 return osect
->the_bfd_section
;
3503 else if (pc_in_unmapped_range (pc
, osect
->the_bfd_section
))
3506 return best_match
? best_match
->the_bfd_section
: NULL
;
3509 /* Function: find_pc_mapped_section (PC)
3510 If PC falls into the VMA address range of an overlay section that is
3511 currently marked as MAPPED, return that section. Else return NULL. */
3514 find_pc_mapped_section (CORE_ADDR pc
)
3516 struct objfile
*objfile
;
3517 struct obj_section
*osect
;
3519 if (overlay_debugging
)
3520 ALL_OBJSECTIONS (objfile
, osect
)
3521 if (pc_in_mapped_range (pc
, osect
->the_bfd_section
) &&
3522 overlay_is_mapped (osect
))
3523 return osect
->the_bfd_section
;
3528 /* Function: list_overlays_command
3529 Print a list of mapped sections and their PC ranges */
3532 list_overlays_command (char *args
, int from_tty
)
3535 struct objfile
*objfile
;
3536 struct obj_section
*osect
;
3538 if (overlay_debugging
)
3539 ALL_OBJSECTIONS (objfile
, osect
)
3540 if (overlay_is_mapped (osect
))
3546 vma
= bfd_section_vma (objfile
->obfd
, osect
->the_bfd_section
);
3547 lma
= bfd_section_lma (objfile
->obfd
, osect
->the_bfd_section
);
3548 size
= bfd_get_section_size (osect
->the_bfd_section
);
3549 name
= bfd_section_name (objfile
->obfd
, osect
->the_bfd_section
);
3551 printf_filtered ("Section %s, loaded at ", name
);
3552 fputs_filtered (paddress (lma
), gdb_stdout
);
3553 puts_filtered (" - ");
3554 fputs_filtered (paddress (lma
+ size
), gdb_stdout
);
3555 printf_filtered (", mapped at ");
3556 fputs_filtered (paddress (vma
), gdb_stdout
);
3557 puts_filtered (" - ");
3558 fputs_filtered (paddress (vma
+ size
), gdb_stdout
);
3559 puts_filtered ("\n");
3564 printf_filtered (_("No sections are mapped.\n"));
3567 /* Function: map_overlay_command
3568 Mark the named section as mapped (ie. residing at its VMA address). */
3571 map_overlay_command (char *args
, int from_tty
)
3573 struct objfile
*objfile
, *objfile2
;
3574 struct obj_section
*sec
, *sec2
;
3577 if (!overlay_debugging
)
3579 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3580 the 'overlay manual' command."));
3582 if (args
== 0 || *args
== 0)
3583 error (_("Argument required: name of an overlay section"));
3585 /* First, find a section matching the user supplied argument */
3586 ALL_OBJSECTIONS (objfile
, sec
)
3587 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3589 /* Now, check to see if the section is an overlay. */
3590 bfdsec
= sec
->the_bfd_section
;
3591 if (!section_is_overlay (bfdsec
))
3592 continue; /* not an overlay section */
3594 /* Mark the overlay as "mapped" */
3595 sec
->ovly_mapped
= 1;
3597 /* Next, make a pass and unmap any sections that are
3598 overlapped by this new section: */
3599 ALL_OBJSECTIONS (objfile2
, sec2
)
3600 if (sec2
->ovly_mapped
3602 && sec
->the_bfd_section
!= sec2
->the_bfd_section
3603 && sections_overlap (sec
->the_bfd_section
,
3604 sec2
->the_bfd_section
))
3607 printf_unfiltered (_("Note: section %s unmapped by overlap\n"),
3608 bfd_section_name (objfile
->obfd
,
3609 sec2
->the_bfd_section
));
3610 sec2
->ovly_mapped
= 0; /* sec2 overlaps sec: unmap sec2 */
3614 error (_("No overlay section called %s"), args
);
3617 /* Function: unmap_overlay_command
3618 Mark the overlay section as unmapped
3619 (ie. resident in its LMA address range, rather than the VMA range). */
3622 unmap_overlay_command (char *args
, int from_tty
)
3624 struct objfile
*objfile
;
3625 struct obj_section
*sec
;
3627 if (!overlay_debugging
)
3629 Overlay debugging not enabled. Use either the 'overlay auto' or\n\
3630 the 'overlay manual' command."));
3632 if (args
== 0 || *args
== 0)
3633 error (_("Argument required: name of an overlay section"));
3635 /* First, find a section matching the user supplied argument */
3636 ALL_OBJSECTIONS (objfile
, sec
)
3637 if (!strcmp (bfd_section_name (objfile
->obfd
, sec
->the_bfd_section
), args
))
3639 if (!sec
->ovly_mapped
)
3640 error (_("Section %s is not mapped"), args
);
3641 sec
->ovly_mapped
= 0;
3644 error (_("No overlay section called %s"), args
);
3647 /* Function: overlay_auto_command
3648 A utility command to turn on overlay debugging.
3649 Possibly this should be done via a set/show command. */
3652 overlay_auto_command (char *args
, int from_tty
)
3654 overlay_debugging
= ovly_auto
;
3655 enable_overlay_breakpoints ();
3657 printf_unfiltered (_("Automatic overlay debugging enabled."));
3660 /* Function: overlay_manual_command
3661 A utility command to turn on overlay debugging.
3662 Possibly this should be done via a set/show command. */
3665 overlay_manual_command (char *args
, int from_tty
)
3667 overlay_debugging
= ovly_on
;
3668 disable_overlay_breakpoints ();
3670 printf_unfiltered (_("Overlay debugging enabled."));
3673 /* Function: overlay_off_command
3674 A utility command to turn on overlay debugging.
3675 Possibly this should be done via a set/show command. */
3678 overlay_off_command (char *args
, int from_tty
)
3680 overlay_debugging
= ovly_off
;
3681 disable_overlay_breakpoints ();
3683 printf_unfiltered (_("Overlay debugging disabled."));
3687 overlay_load_command (char *args
, int from_tty
)
3689 if (gdbarch_overlay_update_p (current_gdbarch
))
3690 gdbarch_overlay_update (current_gdbarch
, NULL
);
3692 error (_("This target does not know how to read its overlay state."));
3695 /* Function: overlay_command
3696 A place-holder for a mis-typed command */
3698 /* Command list chain containing all defined "overlay" subcommands. */
3699 struct cmd_list_element
*overlaylist
;
3702 overlay_command (char *args
, int from_tty
)
3705 ("\"overlay\" must be followed by the name of an overlay command.\n");
3706 help_list (overlaylist
, "overlay ", -1, gdb_stdout
);
3710 /* Target Overlays for the "Simplest" overlay manager:
3712 This is GDB's default target overlay layer. It works with the
3713 minimal overlay manager supplied as an example by Cygnus. The
3714 entry point is via a function pointer "gdbarch_overlay_update",
3715 so targets that use a different runtime overlay manager can
3716 substitute their own overlay_update function and take over the
3719 The overlay_update function pokes around in the target's data structures
3720 to see what overlays are mapped, and updates GDB's overlay mapping with
3723 In this simple implementation, the target data structures are as follows:
3724 unsigned _novlys; /# number of overlay sections #/
3725 unsigned _ovly_table[_novlys][4] = {
3726 {VMA, SIZE, LMA, MAPPED}, /# one entry per overlay section #/
3727 {..., ..., ..., ...},
3729 unsigned _novly_regions; /# number of overlay regions #/
3730 unsigned _ovly_region_table[_novly_regions][3] = {
3731 {VMA, SIZE, MAPPED_TO_LMA}, /# one entry per overlay region #/
3734 These functions will attempt to update GDB's mappedness state in the
3735 symbol section table, based on the target's mappedness state.
3737 To do this, we keep a cached copy of the target's _ovly_table, and
3738 attempt to detect when the cached copy is invalidated. The main
3739 entry point is "simple_overlay_update(SECT), which looks up SECT in
3740 the cached table and re-reads only the entry for that section from
3741 the target (whenever possible).
3744 /* Cached, dynamically allocated copies of the target data structures: */
3745 static unsigned (*cache_ovly_table
)[4] = 0;
3747 static unsigned (*cache_ovly_region_table
)[3] = 0;
3749 static unsigned cache_novlys
= 0;
3751 static unsigned cache_novly_regions
= 0;
3753 static CORE_ADDR cache_ovly_table_base
= 0;
3755 static CORE_ADDR cache_ovly_region_table_base
= 0;
3759 VMA
, SIZE
, LMA
, MAPPED
3761 #define TARGET_LONG_BYTES (gdbarch_long_bit (current_gdbarch) \
3764 /* Throw away the cached copy of _ovly_table */
3766 simple_free_overlay_table (void)
3768 if (cache_ovly_table
)
3769 xfree (cache_ovly_table
);
3771 cache_ovly_table
= NULL
;
3772 cache_ovly_table_base
= 0;
3776 /* Throw away the cached copy of _ovly_region_table */
3778 simple_free_overlay_region_table (void)
3780 if (cache_ovly_region_table
)
3781 xfree (cache_ovly_region_table
);
3782 cache_novly_regions
= 0;
3783 cache_ovly_region_table
= NULL
;
3784 cache_ovly_region_table_base
= 0;
3788 /* Read an array of ints from the target into a local buffer.
3789 Convert to host order. int LEN is number of ints */
3791 read_target_long_array (CORE_ADDR memaddr
, unsigned int *myaddr
, int len
)
3793 /* FIXME (alloca): Not safe if array is very large. */
3794 gdb_byte
*buf
= alloca (len
* TARGET_LONG_BYTES
);
3797 read_memory (memaddr
, buf
, len
* TARGET_LONG_BYTES
);
3798 for (i
= 0; i
< len
; i
++)
3799 myaddr
[i
] = extract_unsigned_integer (TARGET_LONG_BYTES
* i
+ buf
,
3803 /* Find and grab a copy of the target _ovly_table
3804 (and _novlys, which is needed for the table's size) */
3806 simple_read_overlay_table (void)
3808 struct minimal_symbol
*novlys_msym
, *ovly_table_msym
;
3810 simple_free_overlay_table ();
3811 novlys_msym
= lookup_minimal_symbol ("_novlys", NULL
, NULL
);
3814 error (_("Error reading inferior's overlay table: "
3815 "couldn't find `_novlys' variable\n"
3816 "in inferior. Use `overlay manual' mode."));
3820 ovly_table_msym
= lookup_minimal_symbol ("_ovly_table", NULL
, NULL
);
3821 if (! ovly_table_msym
)
3823 error (_("Error reading inferior's overlay table: couldn't find "
3824 "`_ovly_table' array\n"
3825 "in inferior. Use `overlay manual' mode."));
3829 cache_novlys
= read_memory_integer (SYMBOL_VALUE_ADDRESS (novlys_msym
), 4);
3831 = (void *) xmalloc (cache_novlys
* sizeof (*cache_ovly_table
));
3832 cache_ovly_table_base
= SYMBOL_VALUE_ADDRESS (ovly_table_msym
);
3833 read_target_long_array (cache_ovly_table_base
,
3834 (unsigned int *) cache_ovly_table
,
3837 return 1; /* SUCCESS */
3841 /* Find and grab a copy of the target _ovly_region_table
3842 (and _novly_regions, which is needed for the table's size) */
3844 simple_read_overlay_region_table (void)
3846 struct minimal_symbol
*msym
;
3848 simple_free_overlay_region_table ();
3849 msym
= lookup_minimal_symbol ("_novly_regions", NULL
, NULL
);
3851 cache_novly_regions
= read_memory_integer (SYMBOL_VALUE_ADDRESS (msym
), 4);
3853 return 0; /* failure */
3854 cache_ovly_region_table
= (void *) xmalloc (cache_novly_regions
* 12);
3855 if (cache_ovly_region_table
!= NULL
)
3857 msym
= lookup_minimal_symbol ("_ovly_region_table", NULL
, NULL
);
3860 cache_ovly_region_table_base
= SYMBOL_VALUE_ADDRESS (msym
);
3861 read_target_long_array (cache_ovly_region_table_base
,
3862 (unsigned int *) cache_ovly_region_table
,
3863 cache_novly_regions
* 3);
3866 return 0; /* failure */
3869 return 0; /* failure */
3870 return 1; /* SUCCESS */
3874 /* Function: simple_overlay_update_1
3875 A helper function for simple_overlay_update. Assuming a cached copy
3876 of _ovly_table exists, look through it to find an entry whose vma,
3877 lma and size match those of OSECT. Re-read the entry and make sure
3878 it still matches OSECT (else the table may no longer be valid).
3879 Set OSECT's mapped state to match the entry. Return: 1 for
3880 success, 0 for failure. */
3883 simple_overlay_update_1 (struct obj_section
*osect
)
3886 bfd
*obfd
= osect
->objfile
->obfd
;
3887 asection
*bsect
= osect
->the_bfd_section
;
3889 size
= bfd_get_section_size (osect
->the_bfd_section
);
3890 for (i
= 0; i
< cache_novlys
; i
++)
3891 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3892 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3893 /* && cache_ovly_table[i][SIZE] == size */ )
3895 read_target_long_array (cache_ovly_table_base
+ i
* TARGET_LONG_BYTES
,
3896 (unsigned int *) cache_ovly_table
[i
], 4);
3897 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3898 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3899 /* && cache_ovly_table[i][SIZE] == size */ )
3901 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3904 else /* Warning! Warning! Target's ovly table has changed! */
3910 /* Function: simple_overlay_update
3911 If OSECT is NULL, then update all sections' mapped state
3912 (after re-reading the entire target _ovly_table).
3913 If OSECT is non-NULL, then try to find a matching entry in the
3914 cached ovly_table and update only OSECT's mapped state.
3915 If a cached entry can't be found or the cache isn't valid, then
3916 re-read the entire cache, and go ahead and update all sections. */
3919 simple_overlay_update (struct obj_section
*osect
)
3921 struct objfile
*objfile
;
3923 /* Were we given an osect to look up? NULL means do all of them. */
3925 /* Have we got a cached copy of the target's overlay table? */
3926 if (cache_ovly_table
!= NULL
)
3927 /* Does its cached location match what's currently in the symtab? */
3928 if (cache_ovly_table_base
==
3929 SYMBOL_VALUE_ADDRESS (lookup_minimal_symbol ("_ovly_table", NULL
, NULL
)))
3930 /* Then go ahead and try to look up this single section in the cache */
3931 if (simple_overlay_update_1 (osect
))
3932 /* Found it! We're done. */
3935 /* Cached table no good: need to read the entire table anew.
3936 Or else we want all the sections, in which case it's actually
3937 more efficient to read the whole table in one block anyway. */
3939 if (! simple_read_overlay_table ())
3942 /* Now may as well update all sections, even if only one was requested. */
3943 ALL_OBJSECTIONS (objfile
, osect
)
3944 if (section_is_overlay (osect
->the_bfd_section
))
3947 bfd
*obfd
= osect
->objfile
->obfd
;
3948 asection
*bsect
= osect
->the_bfd_section
;
3950 size
= bfd_get_section_size (bsect
);
3951 for (i
= 0; i
< cache_novlys
; i
++)
3952 if (cache_ovly_table
[i
][VMA
] == bfd_section_vma (obfd
, bsect
)
3953 && cache_ovly_table
[i
][LMA
] == bfd_section_lma (obfd
, bsect
)
3954 /* && cache_ovly_table[i][SIZE] == size */ )
3955 { /* obj_section matches i'th entry in ovly_table */
3956 osect
->ovly_mapped
= cache_ovly_table
[i
][MAPPED
];
3957 break; /* finished with inner for loop: break out */
3962 /* Set the output sections and output offsets for section SECTP in
3963 ABFD. The relocation code in BFD will read these offsets, so we
3964 need to be sure they're initialized. We map each section to itself,
3965 with no offset; this means that SECTP->vma will be honored. */
3968 symfile_dummy_outputs (bfd
*abfd
, asection
*sectp
, void *dummy
)
3970 sectp
->output_section
= sectp
;
3971 sectp
->output_offset
= 0;
3974 /* Relocate the contents of a debug section SECTP in ABFD. The
3975 contents are stored in BUF if it is non-NULL, or returned in a
3976 malloc'd buffer otherwise.
3978 For some platforms and debug info formats, shared libraries contain
3979 relocations against the debug sections (particularly for DWARF-2;
3980 one affected platform is PowerPC GNU/Linux, although it depends on
3981 the version of the linker in use). Also, ELF object files naturally
3982 have unresolved relocations for their debug sections. We need to apply
3983 the relocations in order to get the locations of symbols correct. */
3986 symfile_relocate_debug_section (bfd
*abfd
, asection
*sectp
, bfd_byte
*buf
)
3988 /* We're only interested in debugging sections with relocation
3990 if ((sectp
->flags
& SEC_RELOC
) == 0)
3992 if ((sectp
->flags
& SEC_DEBUGGING
) == 0)
3995 /* We will handle section offsets properly elsewhere, so relocate as if
3996 all sections begin at 0. */
3997 bfd_map_over_sections (abfd
, symfile_dummy_outputs
, NULL
);
3999 return bfd_simple_get_relocated_section_contents (abfd
, sectp
, buf
, NULL
);
4002 struct symfile_segment_data
*
4003 get_symfile_segment_data (bfd
*abfd
)
4005 struct sym_fns
*sf
= find_sym_fns (abfd
);
4010 return sf
->sym_segments (abfd
);
4014 free_symfile_segment_data (struct symfile_segment_data
*data
)
4016 xfree (data
->segment_bases
);
4017 xfree (data
->segment_sizes
);
4018 xfree (data
->segment_info
);
4024 - DATA, containing segment addresses from the object file ABFD, and
4025 the mapping from ABFD's sections onto the segments that own them,
4027 - SEGMENT_BASES[0 .. NUM_SEGMENT_BASES - 1], holding the actual
4028 segment addresses reported by the target,
4029 store the appropriate offsets for each section in OFFSETS.
4031 If there are fewer entries in SEGMENT_BASES than there are segments
4032 in DATA, then apply SEGMENT_BASES' last entry to all the segments.
4034 If there are more entries, then ignore the extra. The target may
4035 not be able to distinguish between an empty data segment and a
4036 missing data segment; a missing text segment is less plausible. */
4038 symfile_map_offsets_to_segments (bfd
*abfd
, struct symfile_segment_data
*data
,
4039 struct section_offsets
*offsets
,
4040 int num_segment_bases
,
4041 const CORE_ADDR
*segment_bases
)
4046 /* It doesn't make sense to call this function unless you have some
4047 segment base addresses. */
4048 gdb_assert (segment_bases
> 0);
4050 /* If we do not have segment mappings for the object file, we
4051 can not relocate it by segments. */
4052 gdb_assert (data
!= NULL
);
4053 gdb_assert (data
->num_segments
> 0);
4055 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4057 int which
= data
->segment_info
[i
];
4059 gdb_assert (0 <= which
&& which
<= data
->num_segments
);
4061 /* Don't bother computing offsets for sections that aren't
4062 loaded as part of any segment. */
4066 /* Use the last SEGMENT_BASES entry as the address of any extra
4067 segments mentioned in DATA->segment_info. */
4068 if (which
> num_segment_bases
)
4069 which
= num_segment_bases
;
4071 offsets
->offsets
[i
] = (segment_bases
[which
- 1]
4072 - data
->segment_bases
[which
- 1]);
4079 symfile_find_segment_sections (struct objfile
*objfile
)
4081 bfd
*abfd
= objfile
->obfd
;
4084 struct symfile_segment_data
*data
;
4086 data
= get_symfile_segment_data (objfile
->obfd
);
4090 if (data
->num_segments
!= 1 && data
->num_segments
!= 2)
4092 free_symfile_segment_data (data
);
4096 for (i
= 0, sect
= abfd
->sections
; sect
!= NULL
; i
++, sect
= sect
->next
)
4099 int which
= data
->segment_info
[i
];
4103 if (objfile
->sect_index_text
== -1)
4104 objfile
->sect_index_text
= sect
->index
;
4106 if (objfile
->sect_index_rodata
== -1)
4107 objfile
->sect_index_rodata
= sect
->index
;
4109 else if (which
== 2)
4111 if (objfile
->sect_index_data
== -1)
4112 objfile
->sect_index_data
= sect
->index
;
4114 if (objfile
->sect_index_bss
== -1)
4115 objfile
->sect_index_bss
= sect
->index
;
4119 free_symfile_segment_data (data
);
4123 _initialize_symfile (void)
4125 struct cmd_list_element
*c
;
4127 c
= add_cmd ("symbol-file", class_files
, symbol_file_command
, _("\
4128 Load symbol table from executable file FILE.\n\
4129 The `file' command can also load symbol tables, as well as setting the file\n\
4130 to execute."), &cmdlist
);
4131 set_cmd_completer (c
, filename_completer
);
4133 c
= add_cmd ("add-symbol-file", class_files
, add_symbol_file_command
, _("\
4134 Load symbols from FILE, assuming FILE has been dynamically loaded.\n\
4135 Usage: add-symbol-file FILE ADDR [-s <SECT> <SECT_ADDR> -s <SECT> <SECT_ADDR> ...]\n\
4136 ADDR is the starting address of the file's text.\n\
4137 The optional arguments are section-name section-address pairs and\n\
4138 should be specified if the data and bss segments are not contiguous\n\
4139 with the text. SECT is a section name to be loaded at SECT_ADDR."),
4141 set_cmd_completer (c
, filename_completer
);
4143 c
= add_cmd ("add-shared-symbol-files", class_files
,
4144 add_shared_symbol_files_command
, _("\
4145 Load the symbols from shared objects in the dynamic linker's link map."),
4147 c
= add_alias_cmd ("assf", "add-shared-symbol-files", class_files
, 1,
4150 c
= add_cmd ("load", class_files
, load_command
, _("\
4151 Dynamically load FILE into the running program, and record its symbols\n\
4152 for access from GDB.\n\
4153 A load OFFSET may also be given."), &cmdlist
);
4154 set_cmd_completer (c
, filename_completer
);
4156 add_setshow_boolean_cmd ("symbol-reloading", class_support
,
4157 &symbol_reloading
, _("\
4158 Set dynamic symbol table reloading multiple times in one run."), _("\
4159 Show dynamic symbol table reloading multiple times in one run."), NULL
,
4161 show_symbol_reloading
,
4162 &setlist
, &showlist
);
4164 add_prefix_cmd ("overlay", class_support
, overlay_command
,
4165 _("Commands for debugging overlays."), &overlaylist
,
4166 "overlay ", 0, &cmdlist
);
4168 add_com_alias ("ovly", "overlay", class_alias
, 1);
4169 add_com_alias ("ov", "overlay", class_alias
, 1);
4171 add_cmd ("map-overlay", class_support
, map_overlay_command
,
4172 _("Assert that an overlay section is mapped."), &overlaylist
);
4174 add_cmd ("unmap-overlay", class_support
, unmap_overlay_command
,
4175 _("Assert that an overlay section is unmapped."), &overlaylist
);
4177 add_cmd ("list-overlays", class_support
, list_overlays_command
,
4178 _("List mappings of overlay sections."), &overlaylist
);
4180 add_cmd ("manual", class_support
, overlay_manual_command
,
4181 _("Enable overlay debugging."), &overlaylist
);
4182 add_cmd ("off", class_support
, overlay_off_command
,
4183 _("Disable overlay debugging."), &overlaylist
);
4184 add_cmd ("auto", class_support
, overlay_auto_command
,
4185 _("Enable automatic overlay debugging."), &overlaylist
);
4186 add_cmd ("load-target", class_support
, overlay_load_command
,
4187 _("Read the overlay mapping state from the target."), &overlaylist
);
4189 /* Filename extension to source language lookup table: */
4190 init_filename_language_table ();
4191 add_setshow_string_noescape_cmd ("extension-language", class_files
,
4193 Set mapping between filename extension and source language."), _("\
4194 Show mapping between filename extension and source language."), _("\
4195 Usage: set extension-language .foo bar"),
4196 set_ext_lang_command
,
4198 &setlist
, &showlist
);
4200 add_info ("extensions", info_ext_lang_command
,
4201 _("All filename extensions associated with a source language."));
4203 add_setshow_optional_filename_cmd ("debug-file-directory", class_support
,
4204 &debug_file_directory
, _("\
4205 Set the directory where separate debug symbols are searched for."), _("\
4206 Show the directory where separate debug symbols are searched for."), _("\
4207 Separate debug symbols are first searched for in the same\n\
4208 directory as the binary, then in the `" DEBUG_SUBDIRECTORY
"' subdirectory,\n\
4209 and lastly at the path of the directory of the binary with\n\
4210 the global debug-file directory prepended."),
4212 show_debug_file_directory
,
4213 &setlist
, &showlist
);
4215 add_setshow_boolean_cmd ("symbol-loading", no_class
,
4216 &print_symbol_loading
, _("\
4217 Set printing of symbol loading messages."), _("\
4218 Show printing of symbol loading messages."), NULL
,
4221 &setprintlist
, &showprintlist
);